There is some serious flavor packed into these open face pot roast sandwiches. Thick slices of toast are slathered with herbed mayonnaise, stewed onions, leftover pot roast, and melted gruyere cheese, then topped with a pile of dark leafy greens. They are a delicious way to use up leftover pot roast and get dinner on the table in about 15 minutes. Get the recipe: alittleandalot.com