These Southwestern Vegetarian Chicken Sliders are everything you want out of an appetizer tucked neatly into a portable sandwich. We start with a toasted slider bun and then spread it with seasoned mashed avocado. Top it with crispy veggie nuggets that are perfectly tender on the inside, juicy tomato, crunchy onion, and shredded lettuce. Finish it off with a pickled jalapeno for the perfect kick of flavor.