1
Adjust rack to middle position (middle and top positions for 12 servings) and preheat oven to 350 degrees. Coat a 9-by-13-inch baking dish (two 9-by-13-inch baking dishes for 12) with nonstick cooking spray. Wash and dry produce.
Place 4 TBSP butter (8 TBSP for 12) in a small microwave-safe bowl. Microwave until melted, 30 seconds (continue microwaving in 10-second increments if necessary).
Drain mango. Zest and halve lime.