No Fuss Strawberry Shortcake

Make cake according to package directions. Spray a 9x13-inch baking pan
Slice and smash berries slightly to make some juice.
Mix dry jell-O into strawberries and juice.
Pour mixture into prepared pan.
Sprinkle marshmallows over berries
Pour cake batter over all evenly.
Bake at 350^ for 35 minutes or until cake tests done.
Cake can be turned over if desired onto serving platter. I just serve it from the pan the way it is.
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Note:
Other fruit can be used prepared the same way .Blueberry Mash or Crushed Pineapple Mash or Rhubarb Mash you get the picture. Just adjust the jell-O flavor for each one!