This is less a 'secret' menu hack and more a general menu heads-up. After all, Panera Bread makes a big deal out of its You Pick Two meals, but its Value Duets options are buried further down the menu. This could be because it's a lot cheaper to order, say, a Classic Grilled Cheese and a Creamy Tomato Soup combo on the Value Duets menu than it would be if you ordered them separately. It's a good tip if you're looking to save some extra pennies on your fast food order.