Line a 9x13 cake pan with:
5 cups rhubarb
1/2 cup sugar (sprinkled over rhubarb)
1 sm. Strawberry jello (sprinkled over rhubarb)
1 1/c cup miniature marshmallows - over all
1 pkg yellow (lemon) cake mix (dry). Crumble with hands so no lumps. Sprinkle over all other ingredients.
1 cup warm water, poured very slowly over cake mix
1/c cup melted margarine - drizzled over all
Bake at 350 degrees for 40 - 45 minutes.
Serve warm or cold with whipped cream.