Warm the milk in the microwave for 1 -2 minutes Grate the cheeses and crush the garlic Melt Butter in a large saucepan on medium heat Add flour and stir together Let cook for 2 minutes and then add milk and whisk until smooth Adjust heat and bring to a simmer Add crushed garlic cheeses and seasoning and whisk smooth until smooth and creamy adding a little more milk to thin if the sauce becomes too thick Only add salt after tasting as the chees and butter contain salt