INGREDIENTS
1/4 cup
all purpose flour
1 cup
broccoli florets
3
celery stalks
2 cups
chicken
3/4 cup
chicken broth
1/2 tsp
ground pepper
1 cup
heavy cream
1 tsp
kosher salt
1 cup
milk
1/2 package
pie crust
1 pinch
red pepper flakes
1 cup
shredded cheddar cheese
3 Tbsps
unsalted butter
1/2
yellow onion