INGREDIENTS
1
Bay leaf
4 cloves
Garlic
1/2
Onion, medium
3
sprigs Thyme, fresh
1 tsp
Mustard, dry
4 cups
Elbow macaroni
2 tbsp
All-purpose flour
1
Kosher salt and freshly ground black pepper
5 tbsp
Butter, unsalted
2 cups
Cheddar, grated
4 cups
Milk
1/2 cup
Parmesan, grated