Mix rice, ham, peas, garlic, onion, soup, sour cream, hot sauce, salt, pepper, and 1 1/2 cups cheddar cheese in a large bowl.
Transfer to a large resealable freezer bag, remove the excess air, and seal.
Place the remaining 1 cup cheese in medium bag.
Seal and staple the bags together above the seal and freeze.
Thaw overnight in the fridge.
Place contents of the large bag in a greased casserole dish.
Top with cheese.
Bake at 350°F for 30 minutes.