INGREDIENTS
2 tbsp
unsalted butter
2 tbsp
all-purpose flour
1 1/2 cups
milk (whole milk or 2%)
1 tsp
salt, divided
1/4 tsp
black pepper
1 tsp
dijon mustard
1
egg, lightly beaten
2 cups
chopped broccoli
1/2 lb
elbow macaroni
1 cup
shredded cheddar cheese