"Southern Living; family favorite..."
INGREDIENTS
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2 lbs ground beef
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1 (2 ounce) envelope onion soup mix
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1/2 cup quick-cooking oats, uncooked
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1/4 teaspoon pepper
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1 egg, beaten
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1/2 cup milk
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1/2 lb cheddar cheese, sliced
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1/4 cup chili sauce
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1/2 teaspoon dry mustard