Lee’s Hoisin Sauce
First, make the Hoisin sauce. Heat the oil in a small sauce pan over medium heat. Add the garlic and five-spice powder and cook for 30 seconds. Whisk in the remaining ingredients, bring to a boil, and cook, whisking constantly for 3-4 minutes. Let sauce cool. I like to thin it out with equal parts water for a dipping sauce.
In a large bowl, combine the chicken, garlic, cilantro, shallot, chili flakes, fish sauce, 1 tbsp oil, sea salt, and black pepper. Form into 4-5 patties. Heat a cast-iron skillet with a few tablespoons of oil.
Place the burgers in the pan and cover. Cook for 7 minutes. Uncover and flip. Cover and cook for another 4 minutes. Serve the burger on a few pieces of lettuce with slices of cucumber and sesame seeds. Serve with Hoisin sauce on the side for dipping!