INGREDIENTS
1 lb
Elbow macaroni
1/2 cup
All-purpose flour
1/4 tsp
Blac pepper
1/4 tsp
Cayenne pepper
2 tsp
Kosher salt
1/4 tsp
Nutmeg
6
slices White bread, good-quality
8 tbsp
Butter, unsalted
2 cups
Gruyere
5 1/2 cups
Milk
4 1/2 cups
White cheddar cheese, grated sharp