In a large bowl, combine the ground chicken, chopped spinach, shredded white cheddar, breadcrumbs, onion, garlic, salt, and pepper.
Form the mixture into patties about 1 inch thick.
Heat olive oil in a non-stick skillet over medium heat.
Cook the patties for about 5-6 minutes on each side, or until they reach an internal temperature of 165°F.
Toast the burger buns in the skillet for about 1-2 minutes.
Assemble the burgers with your favorite toppings and condiments.
Serve immediately and enjoy your White Cheddar and Spinach Chicken Burgers!