01 - Preheat oven to 400°F. Lightly grease a baking dish with cooking spray or olive oil.
02 - Pat tilapia fillets dry with paper towels and place in a single layer in the prepared baking dish.
03 - In a small bowl, mix parsley, dill, basil, garlic, lemon zest, salt, and black pepper until evenly combined.
04 - Drizzle olive oil evenly over fillets, then sprinkle the herb mixture on top.
05 - Arrange lemon slices over the fillets to enhance flavor during baking.
06 - Bake in the preheated oven for 18 to 20 minutes, or until fish flakes easily with a fork and appears opaque throughout.
07 - Serve immediately, optionally garnishing with additional fresh herbs.