Strawberry Rhubarb Pudding Cake

Ingredients

4 cups rhubarb
1 cup sugar
(??????) Marshmallow
1 small box strawberry jello

1 1/4 cups flour
3/4 cups sugar
1 egg
1 1/2 teaspoon baking powder
dash of salt
1 tsp. vanilla
4 Tbs. vegetable oil

Instructions

Bake at 325 for 35-40 minutes.