Salisbury Casserole

INGREDIENTS

3 cups

mashed potatoes, leftover or store-bought

1 10.5 ounce can

French onion soup, divided

1 1/2 lb

lean ground beef

1 10.5 ounce can

cream of mushroom soup

1/2

packet dry onion soup mix

1/4 cup

all-purpose flour

1/4 cup

ketchup

2 tbsp

Worcestershire sauce

1 tsp

mustard powder

1/2 tsp

onion powder

1/2 tsp

garlic powder

1 14.5 ounce can

french cut green beans, rinsed and drained

kosher salt and freshly ground pepper,