1 T flour
1/2 t minced garlic
1/2 cup white wine (less if yours is strong flavored)
1/3 cup frozen chopped spinach (can omit if using for the pizza topping)
2 cups half and half
1 to 1-1/2 cups shredded Parmesan (not the stuff in the shaker)
Drizzle a little olive oil in pan, add garlic and saute for just a moment or two so as not to burn the garlic. Add the flour, cooking for a moment.