5 c. fresh or frozen rhubarb, cut into 1/2-inch pieces
1 (6 oz.) pkg. strawberry gelatin
1/2 c. sugar
2 c. miniature marshmallows
1 (18 1/4 oz.) pkg. white or yellow cake mix, prepared to pkg. directions

Place rhubarb in a greased 13 x 9-inch pan. Sprinkle with gelatin, sugar and marshmallows. Pour cake batter over marshmallows.

Bake at 350°F for 50 minutes or until toothpick inserted in the middle comes out clean. Invert cake onto a serving plate. Serve with whipped topping if desired.