Lemon Herb Baked Fish with Roasted Vegetables

Prep Time: 15 minutes
Cook Time: 25–30 minutes
Servings: 4

This lemon herb baked fish is light, juicy, and full of fresh Mediterranean-style flavor. Tender white fish fillets bake in a savory garlic-lemon sauce with cherry tomatoes, zucchini, potatoes, herbs, and roasted lemon slices. It is an easy one-pan dinner that looks impressive but requires very little hands-on work.

Ingredients

For the Fish

• 4 white fish fillets, such as cod, haddock, halibut, or tilapia
• 2 tablespoons olive oil
• 3 cloves garlic, minced
• 1 tablespoon fresh lemon juice
• 1 teaspoon lemon zest
• 1 teaspoon dried oregano
• 1 teaspoon dried thyme
• ½ teaspoon paprika
• ½ teaspoon red pepper flakes, optional
• 1 teaspoon salt
• ½ teaspoon black pepper
• 1 tablespoon sesame seeds, optional
• 2 tablespoons fresh dill or parsley, chopped

For the Vegetables

• 1½ cups baby potatoes, halved or quartered
• 1 medium zucchini, sliced
• 1½ cups cherry tomatoes
• 1 small red onion, cut into wedges
• 1 lemon, sliced into rounds
• 2 tablespoons olive oil
• ½ teaspoon salt
• ¼ teaspoon black pepper

For the Lemon Garlic Sauce

• ½ cup chicken broth or vegetable broth
• 2 tablespoons olive oil
• 2 tablespoons fresh lemon juice
• 2 cloves garlic, minced
• 1 teaspoon honey, optional
• ½ teaspoon dried oregano
• ¼ teaspoon black pepper

Instructions

1. Preheat the oven to 400°F (200°C).
2. Lightly grease a large baking dish with olive oil.
3. Add the potatoes to a bowl and toss them with 1 tablespoon olive oil, a little salt, and black pepper.
4. Place the potatoes in the baking dish and bake them alone for about 12–15 minutes first, since they take longer to cook than the fish.
5. While the potatoes are roasting, prepare the zucchini, cherry tomatoes, red onion, and lemon slices.
6. In a small bowl, mix together the broth, olive oil, lemon juice, minced garlic, honey if using, oregano, and black pepper.
7. Remove the baking dish from the oven.
8. Add the zucchini, cherry tomatoes, and red onion around the potatoes.
9. Pour about half of the lemon-garlic sauce over the vegetables and toss gently.
10. Pat the fish fillets dry with paper towels.
11. Brush the fish lightly with olive oil.
12. Season both sides with salt, black pepper, oregano, thyme, paprika, and red pepper flakes if using.
13. Place the fish fillets over the vegetables in the baking dish.
14. Spoon the remaining lemon-garlic sauce over the fish.
15. Sprinkle the minced garlic, lemon zest, sesame seeds, and some of the chopped herbs over the top.
16. Arrange lemon slices around and over the fish.
17. Return the baking dish to the oven.
18. Bake for another 12–15 minutes, depending on the thickness of the fish.
19. The fish is ready when it flakes easily with a fork and reaches an internal temperature of 145°F (63°C).
20. For slightly more browning on top, broil for the final 1–2 minutes, watching closely.
21. Remove from the oven and let the dish rest for about 3 minutes.
22. Spoon some of the warm pan juices over the fish before serving.
23. Finish with additional fresh dill or parsley and a squeeze of fresh lemon juice.

Tips

Choose firm white fish fillets so they hold together well during baking. Cod, haddock, halibut, and sea bass are especially good choices.

Try to use fillets of similar thickness so they finish cooking at the same time.

Do not overcook the fish. Once it flakes easily and turns opaque in the center, it is ready.

If your potatoes are large, cut them into smaller pieces so they cook completely before the fish is added.

For even more flavor, marinate the fish in the lemon, garlic, olive oil, and herbs for about 15–20 minutes before baking.

You can also add capers or olives for a stronger Mediterranean flavor.

Serving Suggestions

This dish already includes vegetables and potatoes, so it works well as a complete dinner.

You can also serve it with:

• Garlic rice
• Couscous
• Quinoa
• Crusty bread
• Steamed green beans
• Greek salad
• Roasted asparagus

The bread is especially useful for soaking up the flavorful lemon-garlic pan juices.

Storage

Allow leftovers to cool completely.

Store the fish and vegetables in an airtight container in the refrigerator for up to 2–3 days.

For the best texture, reheat gently in a 325°F (165°C) oven for about 8–10 minutes.

Avoid overheating because fish can become dry quickly.

Approximate Nutrition

Per serving:

• Calories: 380–450
• Protein: 30–35 g
• Carbohydrates: 25–30 g
• Fat: 18–22 g
• Fiber: 4–5 g

Nutrition will vary depending on the type of fish and the amount of oil used.

Why This Recipe Works

The vegetables roast directly in the flavorful lemon-garlic sauce, which allows them to absorb the savory juices as they cook. The fish is added later so it stays moist instead of drying out while the potatoes cook.

Fresh lemon balances the richness of the olive oil, while garlic, oregano, thyme, and dill give the dish plenty of aromatic flavor. Roasted cherry tomatoes release their natural sweetness and create an even more flavorful sauce in the bottom of the baking dish.

Q&A

Can I use frozen fish?
Yes, but thaw it completely first and pat it very dry before seasoning.

Can I use salmon instead?
Yes. Salmon works very well, though thicker fillets may need a few additional minutes of baking.

Can I skip the potatoes?
Absolutely. Replace them with extra zucchini, bell peppers, asparagus, or broccoli for a lighter version.

Can I prepare this ahead?
You can chop the vegetables and prepare the sauce several hours ahead. Add and bake the fish shortly before serving for the best texture.

How do I know when the fish is finished?
The flesh should be opaque and separate easily into flakes when gently pressed with a fork. An internal temperature of 145°F (63°C) is the food-safety benchmark.

Can I make it spicy?
Yes. Increase the red pepper flakes or add a little cayenne pepper to the seasoning mixture.