INGREDIENTS
1
Sweet onion
2 tsp
Dijon mustard
8 oz
Elbow noodles, whole wheat
1/4 cup
All-purpose flour
1
Kosher salt
1/2 tsp
Nutmeg, freshly ground
1 tsp
Paprika, smoked
1/2 cup
Panko breadcrumbs
6 tbsp
Butter, unsalted
6 oz
Gruyere cheese
2 oz
Parmesan cheese
4 oz
Swiss cheese
2 1/2 cups
Whole milk