Rhubarb 'n Dumplings

In a 2-quart microwave-safe casserole, combine 1 1/4 cups water, brown sugar and the first 1/4 cup sugar, cornstarch and 3 tablespoons margarine.

Add sliced rhubarb.

Microcook, uncovered, on 100% (High) for 7 to 9 minutes or until mixture is thickened and bubbly, stirring every minute.

Cover casserole to keep warm.