White garlic sauce (for those who cannot use tomato products) or prefer not to.
reserve the grease from 1lb hot italian sausage cooked. (Clydes, Boulder sausage etc)
Drain grease from sausage place in small sauce pot.
add flour until you have a nice consistent roux.
Take 2 cloves of Garlic chopped (fine) dump in to roux
pour 1 cup whole milk, slowly Stirring with a whisk.
once milk has been added season with black pepper, red pepper flakes & salt to tast
heat over med heat until sauce thickens to desired consistency.

I add all sorts of seasoning (onion, more garlic, black, red or white pepper to taste)
This makes a nice topping for shrimp scampi, clams, homemade pizza , pasta etc.

If you like a real snappy white garlic sauce use the grease from 1lb or chorizo (yeah Baby!)