This recipe is orginally from My Recipes.
1 pound ground beef
1/3 cup ketchup
1 teaspoon Worcestershire sauce
8 ounces frozen mixed vegetables (such as carrots, peas, and corn), thawed
1/4 cup (1 ounce) shredded Cheddar (optional)
10 servings of mashed potatoes
Heat oven to 400° F. Place the beef in a large skillet and cook over medium-high heat until no trace of pink remains, about 5 minutes. Spoon off and discard any fat. Stir in the ketchup and 
Worcestershire. Add the vegetables and cook, stirring, for 1 minute. Spoon the beef mixture into a baking dish or into individual ramekins. Mix the cheese (if using) with the potatoes in a medium bowl. Spread the potatoes over the beef and bake until heated through, 10 minutes. Divide among individual plates.
Worcestershire. Add the vegetables and cook, stirring, for 1 minute. Spoon the beef mixture into a baking dish or into individual ramekins. Mix the cheese (if using) with the potatoes in a medium bowl. Spread the potatoes over the beef and bake until heated through, 10 minutes. Divide among individual plates.