1Preheat oven to 350 degrees.
In oil, brown ground beef, onion, and sweet green bell pepper.
2In large prepared(non stick spray) casserole dish, Layer in beef mixture.
Mix soup with green beans, layer on top of beef mixture.
Top with mashed potatoes.
Sprinkle top with a little grated cheddar cheese.
Bake at 350 degrees for 35 minutes.