Easy Shepherd's Pie recipe made with ground beef and frozen vegetables with buttery cheesy mashed potatoes on top. This simple casserole dinner is ready in 1 hour from start to finish.
Bring a pot of salted water to a boil. Add potatoes and cook until potatoes are soft and a fork easily slides through them, about 20 minutes. Drain. Add potatoes back into pot. Add butter and mix until mashed.
In a pan, cook ground beef and green pepper until beef is browned, about 10 minutes. Add in frozen mixed vegetables, tomato soup and onion powder, mixing to combine everything.
Place ground beef mixture into a 8x8 baking dish, spreading out to completely cover the bottom. Add mashed potatoes on top of ground beef mixture, using a spoon or spatula to spread out.
Sprinkle shredded cheese on top.
Bake for 30 minutes. Allow to cool for a couple of minutes before serving.