INGREDIENTS
1/4 cup
Onion
1 tsp
Dijon mustard
1 tsp
Worcestershire sauce
3/4 lb
Shell pasta or elbow macaroni, small
1/3 cup
All-purpose flour
1/8 tsp
Cayenne pepper
1
Salt, Coarse
3 tbsp
Butter, unsalted
4 cups
Cheddar, sharp yellow
4 cups
Whole milk