INGREDIENTS
1/2
head Broccoli
1
stalk Celery
1/2
Onion, medium
1 cup
Chicken or vegetable broth
1 tsp
Mustard, dry
1 lb
Elbow macaroni
2 tbsp
All-purpose flour
1
Kosher salt and freshly ground black pepper
1/2 cup
Breadcrumbs
4 tbsp
Butter, salted
2 1/2 cups
Cheddar, grated sharp
1/4 cup
Half-and-half
1 cup
Parmesan, grated
1 cup
Processed cheese
2 cups
Whole milk