INGREDIENTS
1 tsp
Mustard powder, dry
1 tsp
Worcestershire sauce
1 lb
Pasta shells, medium
1/4 cup
All-purpose flour
1
Salt and ground pepper, Coarse
6
slices White sandwich bread
6 tbsp
Butter, unsalted
4 oz
Havarti cheese
4 oz
Muenster cheese
4 oz
White cheddar cheese, sharp
4 cups
Whole milk