Making this baked lemon herb tilapia is incredibly straightforward and quick. Follow these simple steps to achieve perfectly cooked, flavorful fish every time:

1. Preheat Your Oven and Prepare Baking Dish: Start by preheating your oven to 400°F (200°C). This temperature is ideal for baking tilapia, ensuring it cooks through without drying out too quickly. While the oven is heating, lightly grease a baking dish with cooking spray or a little olive oil. Using a baking dish that’s just large enough to comfortably fit the tilapia fillets is best, as this helps to keep the moisture in. You can use a glass, ceramic, or metal baking dish – all will work well.
2. Prepare the Lemon Herb Marinade: In a small bowl, whisk together the olive oil, lemon juice, dried oregano, dried basil, dried thyme, garlic powder, salt, and black pepper. This mixture forms the flavorful marinade that will infuse the tilapia fillets. Ensure all the dried herbs are well distributed in the oil and lemon juice for an even flavor. If you prefer a stronger lemon flavor, you can add a little lemon zest to the marinade as well.
3. Marinate the Tilapia Fillets: Place the tilapia fillets in the prepared baking dish. Pour the lemon herb marinade evenly over the fillets, ensuring each fillet is well coated. Gently turn the fillets to coat both sides. Allow the tilapia to marinate for at least 10 minutes, or up to 30 minutes if you have time. Marinating allows the flavors to penetrate the fish, resulting in a more flavorful and tender final dish. Don’t marinate for too long, especially with lemon juice, as the acidity can start to “cook” the fish and make it mushy if left for hours.
4. Arrange Lemon Slices: Once the tilapia has marinated, arrange the thin lemon slices over the top of each fillet. This not only adds extra lemon flavor as the fish bakes, but also keeps the fish moist and adds a visually appealing touch to the dish. You can also tuck a few lemon slices underneath the fillets if you like.
5. Bake the Tilapia: Place the baking dish in the preheated oven and bake for 12-15 minutes, or until the tilapia is cooked through and flakes easily with a fork. The exact baking time will depend on the thickness of your fillets. Tilapia is cooked when it reaches an internal temperature of 145°F (63°C). You can check for doneness by gently flaking the fish with a fork – if it separates easily and is opaque throughout, it’s ready. Be careful not to overbake the tilapia, as it can become dry.
6. Optional Broiling for a Golden Finish: If you desire a slightly golden and caramelized top, you can broil the tilapia for the last 1-2 minutes of baking. Keep a close eye on it while broiling to prevent burning. Broiling adds a nice visual appeal and a slight crispness to the edges of the fish.
7. Garnish and Serve: Once baked, remove the tilapia from the oven. If desired, garnish with fresh chopped parsley for a pop of color and fresh flavor. Serve immediately while hot. Baked lemon herb tilapia is delicious served on its own or alongside your favorite side dishes.