Put garlic and cream into a small saucepan over medium to medium low
heat.
Reduce cream to the point where it coats the back of a spoon.
Add the 4oz (1 stick) of butter and let melt.
Reduce heat to low and season with salt and pepper.
When mixture is no longer simmering, add cheeses very slowly while
constantly stirring mixture.
Remove garlic cloves and re-season with salt and pepper to taste.
Notes
Step 5 is very important. Do not add the cheese while the mixture is still simmering otherwise it will more than likely become grainy and un-appetizing. Also once the cheese is added to not bring back to a simmer. Cover with a lid and keep warm until serving..This sauce does not keep well. It is best to use all of it at once. Upon warming up the sauce will break.