5 c. fresh rhubarb, cut in 1 inch pieces
1 (3 oz.) pkg. strawberry Jello
3/4 c. sugar
1 pkg. miniature marshmallows
1 c. fresh strawberries, sliced; optional
1 (18 oz.) pkg. yellow cake mix

Place rhubarb and sliced strawberries in 9 x 12 inch baking dish. Sprinkle on strawberry Jello. Sprinkle sugar over contents on pan. Add a layer of marshmallows. Prepare cake mix according to directions. Pour cake batter over contents of pan. Bake at 350 degrees for 45 minutes. Cool before cutting. Refrigerate.