Mama's Green Chili

This is from a good friend of mine. It's nice to eat when it's cold outside and is very filling.

• Ready In: 3 hrs
• Serves: 20

Ingredients

• 1  lb  flank steak (fajita steak)
• 1⁄4  an onion (diced)
• 1  lb ground beef
• 1  whole celery rib (diced)
• 1  tablespoon butter
• 20  ounces green chilies
• 2 (8 ounce) cans  beef stock
• 1  tablespoon garlic powder
• 1  tablespoon salt
• 1  tablespoon pepper
• 6  potatoes (chopped up)
• 1  tablespoon cornstarch
• 1  cup water

Directions

1. Cook ground beef; save grease.
2. Cook flank steak in ground beef grease.
3. Mix beefs together in a big pot.
4. Saute diced onions and celery 5-10 minutes in butter.
5. Put beef, onions, celery, green chilis, beef stock, garlic powder, salt, and pepper in a big pot.
6. Simmer for two hours.
7. After two hours, add chopped up potatoes.
8. Simmer 45 minutes.
9. Meanwhile, stir cornstarch and cold water in a separate bowl until it looks like milk.
10. Turn big pot to a boil.
11. Slowly, over a period of about 15 minutes, add in cornstarch mixture until it thickens.
12. Serve with cheese, sour cream, and/or tomatoes.