BEEF CORDON BLEU CASSEROLE

1 1/2 lbs ground round beef
1 large yellow onion, diced
1 clove garlic, diced
3 large russet potatoes, peeled and chopped
1 1/2 cups milk
1/4 lb butter, divided
2 tbsp white vinegar
1 cup yellow cheese, shredded
salt and pepper to taste

In a large skillet saute beef, onion, garlic and vinegar (this is the secret) until browned; drain.

Meanwhile boil potatoes in salted water just covering them until done, about ten minutes; drain and add milk and half of the butter. Salt and pepper to taste. Whip or mash until smooth.

Grease a casserole dish and spread meat/onion mixture. Pour potatoes on top and dab with remaining butter. Top with shredded cheese.

Bake at 375 degrees for 15 minutes.