1. Prepare the Chicken Mixture:

1. In a large mixing bowl, combine the ground chicken, finely chopped spinach, shredded white cheddar cheese, breadcrumbs, finely chopped onion, minced garlic, Dijon mustard, Worcestershire sauce, salt, and pepper.
2. Using your hands or a large spoon, gently mix the ingredients until just combined. Do not overmix, as this can make the burgers tough.

2. Shape the Patties:

1. Divide the mixture into four equal portions.
2. Shape each portion into a firm, evenly sized patty, about 3/4-inch thick. Slightly wet hands can prevent sticking.

3. Cook the Patties:

1. Heat a large skillet (preferably cast iron or non-stick) over medium heat.
2. Add a drizzle of olive oil to the skillet.
3. Once the oil is hot, add the chicken patties to the skillet, making sure not to overcrowd the pan.
4. Cook for 5-6 minutes per side, or until the burgers are cooked through and no longer pink in the center. The internal temperature should reach 165°F (75°C).

4. Rest and Assemble:

1. Remove the cooked patties from the skillet and let them rest for a few minutes. This allows the juices to redistribute, resulting in a more moist burger.
2. While the patties are resting, prepare your buns and toppings.
3. Place the patties on the buns and add your favorite toppings, such as lettuce, tomato slices, extra cheese, or condiments.

5. Serve:

1. Serve the burgers immediately.