Rhubarb Upside Down Cake
["1 yellow cake mix", "4 c. rhubarb, cut in 1 inch pieces", "1 1/2 c. sugar", "4 c. miniature marshmallows", "1 small box strawberry Jell-O"]
["Spray 9 x 13-inch pan with Pam.", "On bottom of pan, put layer of rhubarb.", "Sprinkle on sugar.", "Add marshmallows; then sprinkle on Jell-O.", "Top with cake mix that has been made into batter as directed on package.", "Bake at 350\u00b0 for about 45 minutes.", "Serve hot with whipping cream or ice cream."]
["yellow cake", "rhubarb", "sugar", "marshmallows", "O"]