Heat the oven to 375 degrees and spray a cookie sheet with cooking spray.
Season each side of turkey with salt and pepper and melt 2 tablespoons of the butter in a skillet over medium high heat on the stove. Cook the turkey for about 10 minutes until each side is nicely browned, and set aside.
In a small bowl, mix together the mayonnaise and 1/4 cup of parmesan cheese.
Unroll each triangle of crescent rolls and place one piece of turkey at the wide end of each one. Spread a good layer of the mayonnaise mixture on top of each piece of turkey.
Divide the colby jack slices in half to create 8 slices, and add to the top of each piece of turkey.
Roll the crescent dough around each piece of turkey and place on the prepared cookie sheet. Melt the remaining tablespoon of butter in the microwave and brush over the tops of each crescent roll.
Sprinkle each roll-up with the remaining grated parmesan cheese.
Bake for 14-15 minutes or until the roll-ups are golden brown.
Serve with warmed marinara sauce.