Hamburger Pie

This is a recipe that my stepmom made when I was growing up.

Ingredients
1 med onion, chopped
1 tbsp olive oil
1 tbsp butter
1 lb lean ground beef ( I used turkey italian  sausage)
salt/pepper
1/2 lb cooked green beans or 1 1/2 to 2 cups canned
1 10 1/2 ounce condensed tomato soup
5 to 6 med potatoes, cooked/mashed (prepare your favorite)
1/2 tsp salt (to taste)
1/2 tsp pepper
1/4 cup cheddar cheese, grated 

Heat oil and butter in a skillet over medium heat, cook chopped onion until tender and browned.  Add meat and seasonings; brown, stirring to break up. Drain off excess fat. Stir in beans and soup; transfer to a greased 9inch square baking dish.  Spoon mashed potatoes in mounds over the beef mixture. Top with cheddar cheese.  Bake at 350 for 30 minutes.
Serves 4 to 6