01 - Preheat oven to 400°F. Lightly grease a baking dish large enough to hold fillets in a single layer.
02 - Pat tilapia fillets dry with paper towels and place evenly in the prepared dish.
03 - Combine melted butter, lemon juice, lemon zest, minced garlic, chopped parsley, paprika, salt, and black pepper in a small bowl; whisk until blended.
04 - Pour the lemon butter sauce evenly over the tilapia fillets.
05 - Bake for 15 to 20 minutes, until the fish is opaque and flakes easily with a fork.
06 - Garnish with lemon slices and additional parsley if desired. Serve immediately.