One Pot Stove Top Mac and Cheese

INGREDIENTS

2 tbsp

unsalted butter

2 tbsp

all purpose flour

1/4 tsp

ground mustard (optional)

2 cups

skim milk (you may substitute with whole milk if you prefer a richer sauce)

1 1/2 cups

water

2 1/2 cups

uncooked elbow macaroni (about 8 ounces)

1 cup

grated cheddar cheese

salt and pepper,

breadcrumbs and crumbled bacon, for garnish (optional)