There’s no better way to make THE best vegan chicken sandwiches than with these great patties from Gardein! As with all Gardein meat alternatives, these are as close to the real thing as you’ll find, but … Serve these Gardein frozen sliders … Serve these Gardein frozen sliders … Gardein Plant-Based Chick'n Sliders are snack-sized burgers without the chicken. Project Pollo will only offer one menu item, with no modifications, that day (first come, first served from noon to 7pm, limit one per person): the Original Project, a sandwich that features house-breaded vegan chicken… On Sunday (World Vegan Day), vegan eatery Project Pollo is giving away 1,600 chicken sandwiches at its original food cart location at Roadmap Brewery in San Antonio,TX. Great for appetizers or a quick bite, these crispy vegan sliders are ready in just 2 minutes. Great for appetizers or a quick bite, these crispy vegan sliders are ready in just 2 minutes. Gardein Plant-Based Chick'n Sliders are snack-sized burgers without the chicken.