White Castle is out with the vegetarian version of its famous sliders, but...they're not necessarily for dieters. The sliders range between 150 and 270 calories, with customers able to choose from three sauces - honey mustard, ranch, and sweet Thai. Regular beef sliders range between 140 and 220 calories, depending on the topping, according to White Castle's website. The chain, based in Columbus, Ohio, says the sliders are made with Dr. Praeger's veggie patty and include carrots, zucchini, peas and spinach. White Castle Vice President Jamie Richardson said in a statement the company is committed to 'listening to our customers and keeping up with changing tastes' with new menu items.