This potato-topped shepherd’s pie gets extra flavor from the cheese and carrots that are added to the mashed potato crust. And you can take a shortcut with the crust because the recipe calls for frozen mashed potatoes.
Lemon juice adds bright acidity and makes all the difference in such a simple dish. Garnish with a slice of lemon to enhance the citrus effect. Serve with Cherry Tomato Caprese Salad.