Baked Potato Bar

A Baked Potato Bar starts with a 5-pound bag of russet potatoes for $3, feeding four as the entire entree. Bake at 400°F for an hour or microwave for 10 minutes, then split and set out toppings: butter, sour cream, shredded cheese, canned chili, broccoli, bacon bits. Total with toppings: about $8, which is 33% pricier than the Black Bean Tacos (rank #5). Kids love building their own, while adults appreciate the complete meal. The potato does all the heavy lifting, costing less than a typical fast-food combo, with each spud packing 4 grams of protein and fiber.