For an extra layer of flavor, consider roasting the garlic before mincing. This will mellow the garlic's bite and add a subtle sweetness. Fresh oregano can be used in place of dried oregano. Use 1 tablespoon of fresh oregano, finely chopped. Adjust the amount of milk to achieve your desired consistency. For a richer flavor, substitute half-and-half or heavy cream for the nonfat milk. Grated Parmesan or Romano cheese are good substitutes for Asiago cheese.