1 med. onion, chopped
1 c. chopped celery
3 tbsp. butter
3 c. cooked roast beef, diced
1 1/2 c. beef gravy for 1 (10 1/2 oz.) can beef gravy
1 tsp. oregano leaves
1/2 tsp. salt
1/4 tsp. ground black pepper
1 tbsp. Worcestershire sauce
4 c. seasoned mashed potatoes
2 tbsp. grated Parmesan cheese
Paprika

Saute onion and celery in butter until tender. Stir in meat, oregano, and gravy. Season with salt, pepper and Worcestershire sauce. Heat through.

Pour hot mixture into buttered shallow 2 quart casserole. Spoon mashed potatoes over hash. Sprinkle with cheese and paprika. Bake at 350 degrees for 40 minutes.