Guy Fieri's Drive-In, Diners & Dives grilled cheese sandwich? What are the cheeses?

The diner was somewhere in California and they started by putting garlic spread on 2 pieces of sourdough bread. Then they put parmesan on the garlic sides. Afterwards, they put 2 slices of cheese on each 1/2 and grilled the sides, garlic/parmesan sides down. There were 4 different kinds of cheese. I remember colby and mozzarella and I think cheddar. Does anyone remember for sure what the four cheeses were? I'm so mad I didn't write it down.