You can substitute just about any cheese for the Cheddar called for in this recipe. Some cheeses that melt well include American, provolone, Monterey Jack, pepper jack and Swiss. Crispy pancetta can be substituted for bacon. To make crispy pancetta, place slices of pancetta on a foil-lined sheet pan and put the pan into a cold oven. Set the oven for 375 degrees F and cook until the pancetta is crisp, about 10 minutes. Place the pancetta on a plate lined with a paper towel to drain.