Pre heat your oven to 400 degrees
Place the frozen sliced peaches, pineapple and mango in a large bowl
Add sugar, corn starch, salt and bourbon (or vanilla) and stir to combine
Melt butter in the cast iron skillet
Add the fruit mixture to the skillet and bring to a simmer
Stir and let simmer for 8 minutes
Separate the cinnamon rolls and place on top of the peach mixture
Bake the cobbler for 20 minutes or until all the fruit is hot and the biscuits are brown
Spread the icing on top of the cinnamon rolls and serve