Prepare Your Ingredients: Chop cilantro and slice avocados.
Cook the Chicken: Preheat grill or skillet over medium heat. Season chicken with salt and pepper. Grill each side for 6-7 minutes until internal temperature reaches 165°F (74°C).
Make the Mixture: Shred cooked chicken into pieces. In a bowl, combine shredded chicken, breadcrumbs, cilantro, lime juice, and diced avocado; mix gently until combined.
Form Your Patties: Shape mixture into four patties.
Cook Your Patties: Grill or pan-fry patties for about three minutes per side until golden brown.
Assemble Your Burgers: Toast buns lightly; spread Greek yogurt mixed with garlic powder on each bun before adding the patties and extra avocado slices if desired.