Need an easy crowd-pleasing vegetarian dish to throw on the grill? Everyone loves sweet potatoes, especially kids, so try these simple grilled sweet potato skewers with savory-sweet honey mustard. The recipe calls for sweet potatoes, green and red bell peppers, red onions, a little bit of salt and pepper, and of course, some honey mustard. This grilled sweet potato skewers with honey mustard recipe is the perfect vegetarian barbecue recipe for sweet potato lovers. Be careful if you're planning on serving this dish to vegans, however, as many vegans avoid eating honey. This recipe is gluten-free.