INGREDIENTS
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1 pound ground beef
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1/3 cup ketchup
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1 teaspoon Worcestershire sauce
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8 ounces frozen mixed vegetables (such as carrots, peas, and corn), thawed
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1/4 cup (1 ounce) shredded Cheddar (optional)
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1 16-ounce package mashed potatoes, refrigerated or frozen and thawed