Preheat the oven to 400°F
Pat the mahi mahi fillets dry
Place the fillets on a lightly greased baking sheet or in a baking dish
Brush or drizzle the fish with olive oil or melted butter
Season with salt and pepper
Add optional seasonings such as garlic, paprika, lemon juice, or herbs
Bake for 10 to 15 minutes, depending on thickness
Check for doneness when the fish flakes easily with a fork and reaches 145°F internally
Remove from the oven and serve immediately