- Pre heat oven to 350 degrees F
- Sauté onions, add beef, garlic, salt & pepper
- Brown meat, add green beans & gravy, put a lid on the pan and steam for 3-5 minutes
- Pour meat & green bean mixture into 8×8 casserole dish, spread prepared mashed potatoes over the top, and sprinkle with cheese
- Bake for 20-30 minutes, or until cheese is melted, and everything is hot.