Crispy Garlic Parmesan Zucchini & Potato Tian
Thin slices of golden potatoes and fresh zucchini bake together with garlic, olive oil, herbs, and Parmesan in this comforting vegetable tian. The potatoes turn tender underneath, while the exposed edges become beautifully golden. Zucchini adds moisture and a delicate flavor, and the Parmesan creates a savory crust across the top.
Arranging the vegetables in overlapping rows makes this simple dish look special enough for a holiday table. It also works as an everyday side with roasted chicken, baked fish, or a fresh salad.
This homemade version is inspired by the dish in your photo.
Prep time: 25 minutes
Cook time: 60–75 minutes
Resting time: 10 minutes
Total time: Approximately 1 hour 35 minutes to 1 hour 50 minutes
Servings: 6 side-dish portions
Oven temperature: 400°F (200°C)
Ingredients for Crispy Garlic Parmesan Zucchini & Potato Tian
For the vegetables
1½ pounds Yukon Gold potatoes, about 4 medium
1 pound zucchini, about 2–3 medium
1 small yellow onion, thinly sliced
1 tablespoon olive oil, for the onion
¼ cup low-sodium vegetable broth
A little olive oil, for greasing the baking dish
For the garlic herb coating
3 tablespoons olive oil
4 garlic cloves, finely minced
1 teaspoon fresh thyme leaves, or ½ teaspoon dried thyme
1 teaspoon finely chopped fresh rosemary, or ½ teaspoon dried rosemary
½ teaspoon dried oregano
¾ teaspoon fine salt, divided
½ teaspoon freshly ground black pepper
¼ teaspoon paprika, optional
For the topping
¾ cup finely grated Parmesan cheese, about 60 grams
1 tablespoon chopped fresh parsley
Fresh thyme or rosemary sprigs, optionalLemon wedges, optional, for serving
Instructions for Crispy Garlic Parmesan Zucchini & Potato Tian
1. Prepare the oven and baking dish
Preheat your oven to 400°F (200°C). Lightly grease a shallow 9-by-13-inch baking dish with olive oil.
A shallow dish helps moisture evaporate during the uncovered baking stage. Use a dish large enough to hold the vegetables in overlapping rows without squeezing them too tightly.
2. Soften the onion
Heat 1 tablespoon olive oil in a skillet over medium heat. Add the thinly sliced onion and cook for 6–8 minutes, stirring occasionally, until softened and lightly golden.
Spread the onion evenly across the bottom of the prepared baking dish. This creates a flavorful base and keeps the bottom layer of potatoes from sticking directly to the dish.
3. Slice the vegetables evenly
Wash the potatoes and zucchini thoroughly. Leave the skins on, or peel the potatoes if you prefer.
Slice both vegetables into rounds approximately ⅛ inch thick, or 3 millimeters. A mandoline makes this easier, but a sharp knife also works. When using a mandoline, always use its hand guard.
Keep the potato slices especially consistent. Thick slices will take longer to soften and may remain firm after the zucchini is cooked.
4. Remove some zucchini moisture
Place the zucchini rounds in a colander and sprinkle with ¼ teaspoon of the measured salt. Toss gently and leave for 10 minutes while you prepare the remaining ingredients.
Pat the zucchini thoroughly dry with a clean kitchen towel or paper towels. There is no need to rinse it.
This step helps reduce excess liquid in the finished dish, especially when using larger zucchini.
5. Make the garlic herb mixture
In a large bowl, combine 3 tablespoons olive oil, minced garlic, thyme, rosemary, oregano, the remaining ½ teaspoon salt, black pepper, and optional paprika.
Stir well so the garlic and herbs are evenly distributed. Add the potato rounds and toss carefully until coated. Then add the dried zucchini rounds and gently turn everything together.
Separate any slices that stick together so the seasoning reaches between them.
6. Arrange the tian
Make small stacks of alternating potato and zucchini slices. Stand each stack at a slight angle over the onion layer, then continue arranging them in overlapping rows.
You can also arrange the slices in a circular pattern if using a round baking dish.
Keep the vegetables snug enough to support one another, while allowing small gaps for heat to circulate. Scrape any garlic herb oil remaining in the bowl over the vegetables.
Pour the vegetable broth carefully around the edges of the dish.
7. Cover and bake
Cover the dish tightly with foil and bake for 40–50 minutes.
The covered stage traps steam, helping the potatoes cook through without drying their exposed edges. After 40 minutes, carefully lift one corner of the foil and test a potato slice near the center with a small knife.
It should be almost tender. If it still feels noticeably firm, cover again and bake for another 10 minutes before continuing.
8. Add Parmesan and brown the top
Remove the foil and sprinkle the Parmesan evenly over the vegetables, allowing some cheese to fall between the slices.
Return the dish to the oven, uncovered, for 20–25 minutes, until the potatoes are fully tender, the cheese is golden, and the exposed edges are crisp.
If the top needs more color, broil briefly for 1–2 minutes, watching constantly. Only broil if your baking dish is suitable for that setting.
9. Rest and serve
Let the tian rest for 10 minutes before serving. This allows the bubbling juices to settle and makes portions easier to lift.
Sprinkle with parsley and a few fresh herb leaves. Serve warm, with lemon wedges on the side if you enjoy a little brightness against the garlic and Parmesan.
Tips for the Best Results for Crispy Garlic Parmesan Zucchini & Potato Tian
Choose similarly sized vegetables. Potatoes and zucchini with similar diameters create neat rows and help the slices cook evenly. Cut unusually wide potato rounds in half if necessary.
Use freshly grated Parmesan. It generally melts more evenly than coarse packaged shreds. Finely grated cheese also spreads across the vegetables without leaving large bare patches.
Check tenderness before adding the topping. Golden cheese does not necessarily mean the potatoes are cooked. Test the center of the dish, where the slices usually take longest to soften.
Avoid packing the rows too tightly. Excessively compressed vegetables trap moisture and slow cooking. Gentle overlapping gives you tender centers and better browning.
Adjust for your baking dish. A deep dish or thick ceramic baker may require extra time. Start checking at the suggested time, then continue baking according to the potatoes’ tenderness.
Expect crisp edges and tender centers. A tian contains moisture-rich vegetables, so the entire dish will not become crunchy. Its appeal comes from the contrast between browned tops and soft layers underneath.
Recipe Notes and Variations for Crispy Garlic Parmesan Zucchini & Potato Tian
Yukon Gold potatoes work particularly well because of their creamy texture and thin skin. Red potatoes are another option. Russet potatoes can be used, although their slices may become more fragile once cooked.
Choose firm, medium zucchini with smooth skin. Very large zucchini often have watery centers and prominent seeds, which can make the bake wetter.
For a different flavor, replace some zucchini with yellow summer squash. Keep the slices the same thickness and follow the same salting and drying method.
A small pinch of red pepper flakes adds gentle heat. You can also add a little finely grated lemon zest to the herb mixture.
For a vegetarian version, choose Parmesan-style cheese made with vegetarian rennet. Traditional Parmesan may contain animal rennet.
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Serving Suggestions for Crispy Garlic Parmesan Zucchini & Potato Tian
Serve this tian alongside roast chicken, turkey, grilled fish, or baked salmon. Its garlic and herb flavors also pair well with white beans or lentils.
For a simple vegetarian meal, serve a generous portion with a chickpea salad and a lemon dressing. Add crusty bread if desired.
Because the dish already contains potatoes, lighter vegetable or protein accompaniments usually provide a balanced plate.
Storage and Reheating for Crispy Garlic Parmesan Zucchini & Potato Tian
Allow leftovers to cool, then refrigerate in an airtight container within two hours. Use within 3–4 days.
For the best texture, reheat in a 375°F (190°C) oven until hot throughout. Cover loosely at first if needed, then uncover to refresh the top. A microwave is convenient, but the edges will soften.
Freezing is possible, although zucchini often becomes softer and releases additional moisture after thawing. This recipe is best enjoyed freshly baked or refrigerated.
Approximate Nutritional Information
Per serving, based on 6 servings:
Nutrient Approximate amount
Calories 260
Protein 8 g
Carbohydrates 28 g
Total fat 14 g
Saturated fat 3 g
Fiber 4 g
Total sugars 4 g
Sodium 470 mg
Values are estimates and vary with ingredient brands, cheese quantity, and portion size. They exclude optional accompaniments.
Nutritional Benefits for Crispy Garlic Parmesan Zucchini & Potato Tian
Vegetable variety: Zucchini and potatoes contribute different nutrients and textures, making this an appealing way to include more vegetables in a meal.
Fiber: Leaving the potato and zucchini skins on adds fiber, which supports normal digestion and helps make meals satisfying.
Potassium: Both vegetables contribute potassium, a mineral involved in normal muscle and nerve function.
Unsaturated fats: Olive oil supplies mostly unsaturated fats and helps carry the flavors of garlic and herbs.
Protein and calcium: Parmesan contributes some protein and calcium. This remains primarily a vegetable side dish, so pairing it with beans, fish, or chicken adds more protein.
Questions and Answers for Crispy Garlic Parmesan Zucchini & Potato Tian
What is a vegetable tian?
A vegetable tian is a baked dish associated with southern French cooking. Sliced vegetables are arranged together and baked with ingredients such as olive oil and herbs. This version adds potatoes and Parmesan for a hearty finish.
Do I need to boil the potatoes first?
No. Thinly sliced potatoes cook during the covered baking stage. If your slices are thicker than directed, they may need additional covered baking time.
Why are my potatoes still hard?
They may be too thick, tightly packed, or insufficiently covered. Add a small splash of broth if the dish looks dry, cover tightly, and continue baking until tender.
Why is my tian watery?
Zucchini naturally releases water. Patting the salted slices dry, using a shallow dish, and finishing uncovered help reduce excess moisture.
Can I prepare it ahead?
Yes. Bake through the covered stage, cool promptly, and refrigerate. Reheat covered until hot, then add Parmesan and finish uncovered. Allow extra time when starting from chilled.
Can I leave out the cheese?
Yes. The vegetables will still taste delicious with garlic and herbs, although the topping will be less savory. A little seasoned breadcrumb topping can add texture.
