5 c. sliced rhubarb
1 c. sugar
1 (3 oz.) pkg. strawberry Jello
3 c. miniature marshmallows
1 yellow cake mix

Spread rhubarb in greased 9"x13" pan. Sprinkle with Jello, then sugar. Sprinkle marshmallows over top. Prepare cake mix as directed and spread on top of marshmallows. Bake at 350 degrees for 1 hour. Cool completely, then invert pan. Serve with sweetened whipped cream.