Step 1: Preheat the Oven
Preheat your oven to 375°F (190°C). This ensures the fish cooks evenly and retains its moisture.

Step 2: Prepare the Fish
Pat the fish fillets dry with a paper towel. Place them in a baking dish and drizzle with olive oil. Season both sides with salt, pepper, paprika, and oregano.

Step 3: Add the Toppings
In a mixing bowl, combine the cherry tomatoes, Kalamata olives, red onion, garlic, parsley, basil, and lemon juice. Mix well. Spread this mixture evenly over the fish fillets.

Step 4: Bake the Fish
Place the baking dish in the preheated oven and bake for 15-20 minutes, or until the fish is opaque and flakes easily with a fork. If using feta cheese, sprinkle it over the fish during the last 5 minutes of baking.

Step 5: Garnish and Serve
Remove the fish from the oven and garnish with fresh lemon slices and additional parsley or basil if desired. Serve immediately.