Poor Man's Pie

Ingredients (8 items)

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• 1 pound ground beef
• salt and ground black pepper to taste
• 1 pinch garlic powder, or to taste
• 1 pinch onion powder, or to taste
• 1 (10.75 ounce) can cream of mushroom soup
• 2 (15 ounce) cans green beans, drained
• 5 cups mashed potatoes
• 2 cups shredded Cheddar cheese