Sneak kids their veggies in these delicious loaded mashed potatoes! Boil potatoes and cook frozen chopped spinach. Drain and mix with butter, sour cream, chopped onion, salt and dill. Transfer to a buttered casserole dish and top with shredded Cheddar cheese. Bake until bubbly, browned and irresistible! Then dish out big cheesy portions to general acclaim! Get the recipe for Sally's Spinach Mashed Potatoes.