In a mixing bowl, combine the ground chicken, chopped spinach, shredded white cheddar, breadcrumbs, minced garlic, onion powder, salt, and black pepper.

Using your hands (clean, of course!), mix the ingredients until well combined. You want a uniform mixture that’s easy to mold into patties.

Divide the mixture into four equal parts and shape each into a patty, about ¾ inch thick. Make a small indentation in the center of each patty to prevent them from puffing up while cooking.

In a non-stick skillet or grill over medium heat, cook the patties for about 5-6 minutes on each side, or until they are cooked through and the internal temperature reaches 165°F (75°C).

You should see a nice golden-brown crust forming and the cheese melting slightly.

If desired, toast your burger buns on the grill or in a toaster until golden brown to add extra crunch.

Place a cooked patty on each bun, top with fresh lettuce, sliced tomato, and any additional toppings like sauces or condiments you prefer.