Ingredient:

• 1/4 cup minced onion
• 6 tablespoons panko bread crumbs
• 1 large egg
• 1 tablespoon Worcestershire sauce
• 3 cloves garlic, minced
• salt and freshly ground black pepper to taste
• 1 pound ground turkey
• 1/2 cup prepared yellow mustard
• 1/2 cup pure maple syrup
• 2 tablespoons bourbon whiskey
• 1 tablespoon tomato paste
• 1/4 teaspoon salt
• 1/4 teaspoon freshly ground black pepper
• 1 pinch cayenne, or more to taste (optional)
• 1 tablespoon butter
• chopped fresh parsley for garnish