Grandma’s Ground Beef Chow Mein Casserole

For the Filling:

1 lb ground beef

1 small onion, finely chopped

2 cloves garlic, minced

1 can (6 oz) chow mein noodles (crispy variety)

1 can (8 oz) water chestnuts, drained and chopped

1 cup frozen peas and carrots, thawed

1/4 cup soy sauce (low-sodium preferred)

2 tablespoons Worcestershire sauce

1 tablespoon brown sugar

1 teaspoon sesame oil

1 teaspoon grated ginger (fresh or ground)

Salt and pepper, to taste

For the Topping: