01 - Preheat oven to 400°F. Lightly grease a baking dish large enough to accommodate tilapia fillets in a single layer.
02 - Pat tilapia fillets dry with paper towels and arrange them in the prepared baking dish.
03 - In a small bowl, whisk together melted butter, minced garlic, parsley, lemon juice, lemon zest, salt, and black pepper until well combined.
04 - Pour the lemon garlic butter mixture evenly over the tilapia fillets.
05 - Bake for 12 to 15 minutes until the fish is opaque and flakes easily with a fork.
06 - If desired, broil for 1 to 2 minutes for a golden top, monitoring closely to prevent burning.
07 - Garnish with lemon slices and fresh parsley before serving.