Ohio-based slider chain introduces Southwest Veggie Slider permanently after customer feedback for meatless optionVegetarians have a new reason to celebrate: White Castle has added a permanent meat-free option to its menu.On Monday, the Columbus, Ohio-based slider chain announced the launch of the Southwest Veggie Slider, featuring a crispy brown rice crust and a smoky chipotle- and barbecue-inspired veggie patty made with sweet potatoes, black beans, corn, red bell peppers, onions and carrots. Continue reading...