Meatball and Stuffing Bake

INGREDIENTS

2 tbsp

unsalted butter

1/2

of a medium onion , chopped

1/2

stalk (rib) of celery , chopped

1 1/4 cups

chicken stock or broth

2 1/2 cups

herbed seasoned stuffing (like Pepperidge Farm)

2 cans

cream of mushroom soup

1/2 cup

milk

2 1 pound packages

of seasoned, frozen, pre-cooked meatballs , thawed

2 cups

frozen peas

1 cup

shredded cheddar cheese

Salt and pepper , to taste, only if needed