A delicious balance of sweet/tart. Try also serving over vanilla ice cream.
In a medium bowl, combine grapefruit, oranges, and pineapple. Transfer to a 1-quart, broiler-safe casserole dish
In a small bowl, mix together brown sugar and butter; sprinkle over fruit.
Broil about 4 inches from heat for 5 to 6 minutes until sugar is bubbly and fruit is warmed.