01 - Preheat oven to 400°F. Lightly grease a baking dish large enough to hold the fillets in a single layer.
02 - Pat tilapia fillets dry with paper towels. Arrange them in the baking dish. Drizzle with olive oil and season both sides with salt and pepper.
03 - In a small bowl, whisk together melted butter, minced garlic, lemon zest, lemon juice, parsley, and paprika.
04 - Pour the lemon butter sauce evenly over the tilapia fillets. Top with lemon slices.
05 - Bake for 15–20 minutes, or until the fish flakes easily with a fork and is opaque throughout.
06 - Remove from oven, garnish with additional parsley, and serve immediately.