Skillet Shepards' Pie

Ingredients
    1½ pounds lean ground beef
    1 onion, minced
    2 garlic cloves, minced
    1½ tbsp Worcestershire sauce
    1 tbsp flour
    salt and pepper, to taste
    1½ cups frozen peas, thawed
    1½ cups frozen corn, thawed
    4 cups mashed potatoes
    1 cup grated cheese (cheddar, monterey jack,etc.)
Instructions
    Preheat oven for 400F.
    Brown the ground beef, onion and garlic, on high heat, in a cast iron skillet. Stir often, ensuring that the beef does not stick to the bottom of the skillet. Once fully cooked, remove from the hot element and drain the grease drippings. Stir in the Worcestershire sauce, flour, salt, pepper, peas and corn.
    Spread the mashed potatoes on top of the beef mixture.
    Sprinkle the grated cheese on top.
    Bake in the oven until the cheese is melted and the beef filling is starting to bubble around the sides of the skillet. It should take 15-25 minutes.
    Let the pie rest about 5 minutes before serving