First Step: PREPARE THE FISH AND VEGGIES

1. Preheat the Oven: Begin by preheating your oven to 400°F (200°C). This ensures that the fish and vegetables cook at the right temperature, allowing everything to bake evenly and quickly.
2. Prepare the Fish: Place the fish fillets on a large baking dish. Drizzle both sides of the fillets with olive oil, and season generously with salt and pepper. Make sure the fish is evenly coated. The olive oil will help keep the fish moist during baking and enhance its natural flavor.
3. Prepare the Vegetables: In a separate bowl, combine the sliced tomatoes, onion, bell pepper, olives, garlic, and capers. Toss them together with a drizzle of olive oil, salt, and pepper to coat the vegetables evenly. This medley of vegetables will serve as the flavorful base for the fish.

Second Step: ASSEMBLE THE DISH

1. Arrange the Fish and Vegetables: Spread the prepared vegetable mixture evenly around the fish fillets in the baking dish. The vegetables should surround the fish, creating a bed of colorful and aromatic ingredients.
2. Add Lemon and Herbs: Place a few lemon slices over the fish fillets and tuck them in between the vegetables. Sprinkle the chopped parsley and oregano (or thyme) over the entire dish. The fresh herbs will infuse the fish and vegetables with their earthy, aromatic flavor as they bake.
3. Optional: Add White Wine: If using white wine, pour it around the fish and vegetables in the baking dish. The wine will help steam the fish while adding a subtle depth of flavor to the dish.

Third Step: BAKE THE FISH

1. Bake the Dish: Place the baking dish in the preheated oven and bake for 20-25 minutes, or until the fish is cooked through and flakes easily with a fork. The vegetables should be tender and slightly caramelized. Be sure to keep an eye on the fish during the last few minutes of baking to prevent overcooking.
2. Check for Doneness: To check if the fish is done, gently press down on the fillets with a fork. If the flesh flakes easily and is opaque in the center, the fish is ready. If not, return the dish to the oven for an additional 5-10 minutes.

Fourth Step: GARNISH AND SERVE

1. Garnish the Dish: Once the fish is baked and the vegetables are tender, remove the dish from the oven. Garnish with freshly chopped parsley and basil (if using) for a fresh, vibrant touch.
2. Serve with Optional Toppings: If desired, sprinkle some crumbled feta cheese over the top for added creaminess and a salty bite. Serve with extra lemon wedges on the side for those who prefer a bit more acidity.
3. Serve and Enjoy: This Mediterranean Baked Fish is best enjoyed with a side of warm, crusty bread to soak up the delicious juices, or over a bed of couscous, quinoa, or rice. It also pairs well with a light salad for a complete and balanced meal.