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Tags and nutritional info are auto-generated and may be inaccurate. Always check the full ingredient list before cooking.
Combine ground chicken, egg, breadcrumbs, Parmesan, salt, pepper, Italian seasoning, garlic powder, onion powder, and 2 tbsp Worcestershire sauce in a large bowl.
Form the mixture into 4 equal-sized patties.
Heat olive oil in a pan over medium heat and cook patties on both sides until the internal temperature reaches 165°F. Remove from pan.
Add sliced onions to the pan (add additional olive oil if necessary to prevent sticking) and sauté on low-medium heat until caramelized.
Mix in the remaining Worcestershire sauce with the onions.
Move onions to one side of the pan and add patties back to the pan, topping with Swiss cheese.
Cover with a lid until the cheese is melted.
Combine mayonnaise and Dijon mustard in a small bowl and spread on the bottom half of the bun.
Top with burger patty, caramelized onions, and spinach.
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Add a splash of balsamic vinegar to the onions for extra depth of flavor.
Use a meat thermometer to ensure patties are cooked to the correct temperature.
Can I use ground beef instead of chicken?
Yes, ground beef can be used as a substitute for ground chicken.
How do I know when the onions are caramelized?
The onions are caramelized when they are soft, golden brown, and have a sweet aroma.
Can I prepare the patties in advance?
Yes, you can prepare the patties and refrigerate them for up to 24 hours before cooking.
What can I use instead of Swiss cheese?
Provolone or mozzarella cheese can be used as alternatives to Swiss cheese.
How can I make the burgers spicier?
Add a pinch of cayenne pepper or some chopped jalapeños to the chicken mixture for extra heat.
