The ultimate classic comfort food. This recipe calls for a blend of cheddar and pepper jack cheeses, but really you can feel empowered to try your own mix of cheese. Some delicious cheese choices: asiago, jarlsberg, or smoked gouda. Other delicious add-ins: tuna, bacon, peas, steamed broccoli, or kale. Also consider topping with a sprinkle of bread crumbs and some additional grated cheese before baking.