Combine tequila, lime juice, pineapple juice, chili powder, jalepeno, cumin, garlic, salt, pepper, and turkey in a large zip top bag. Marinate in refrigerator 12 hours.
Preheat grill to medium. Grill turkey 6-8 minutes on each side or until turkey is done. Slice turkey and serve with desired toppings in cheddar cheese shells.
Cheddar Cheese Shells
Preheat oven to 400. Line a baking sheet with parchment paper. Wrap a yardstick or ruler in foil, and suspend it between two cans.
Divide the cheese into 8 equal parts (a little over 1/3 cup each). Spread the cheese into 4 inch circles on the parchment paper making sure that no cheese is off the parchment (it will stick). You may need to do this in batches.
Bake each batch at 400 for 6-8 minutes or until melted and beginning to brown.
Using a spatula, carefully remove the cheese circles and drape them over the ruler suspension to form shells. Allow to hang until cooled. Repeat with remaining cheese.