How many times have you made mashed potatoes just so you'll have leftovers for shepherd's pie? Using potato tots instead not only saves you time but makes for a crispy topping that's a nice contrast to the beef filling.
02Turn the heat down to medium and discard all but 2 tablespoons of fat from the skillet. Add the onions, garlic and thyme, stir to combine and cook until the onions are soft and translucent, about 5 minutes. Add the flour and tomato paste and cook, stirring, for 2 minutes. Add the cooked beef, beef stock, Worcestershire sauce, soy sauce, 1 1/4 teaspoons salt and 1/4 teaspoon pepper and bring to a boil. Reduce the heat and simmer until the sauce has thickened, about 4 minutes. Remove the thyme sprigs if using. Fold in the peas and carrots.
03Transfer the mixture to an 8-inch square casserole pan, and top with the potato tots and Cheddar. Bake until the potato tots are crisp and the meat layer is bubbling up the sides, 20 to 25 minutes.