Chicken Caesar Burger

Name: Chicken Caesar Burger
Prep time: 35 min
Cook time: 12 min
Total time: 47 min
Cuisine: American
Ingredients: 1 lb ground chicken; 1/4 cup white onion, shredded; 2-3 tablespoons frozen butter, shredded*; 2 teaspoons garlic, minced; 1 teaspoon worcestershire; 2 tablespoons mayonnaise; 1 teaspoon dijon mustard; 1/2 teaspoon lemon zest; 1/2 teaspoon liquid smoke (optional)**; 2 tablespoons parmesan cheese, finely shredded; kosher salt and ground black pepper; hamburger bun of your choice (regular or gluten-free); romaine lettuce; Caesar Dressing (or Dairy-Free Caesar Dressing); shaved parmesan cheese; croutons