Heat a large non-stick sauté pan, so that it's super hot.
Reserving a little of the sesame oil and sesame seeds for the garnish, in a mixing bowl, blend all your ingredients, except the lettuce cups. Season with a little salt and pepper.
Evenly spread a thin layer of the chicken mixture on the bottom of the hot sauté pan. It should be a thin layer of chicken. It should "sear", not simmer. If you add too much chicken, it will just simmer and steam. You can do this in batches, just make sure you wipe out the pan between batches. You want a high heat sear, to get a little color on the chicken.
Sauté until the chicken is cooked through.
Place a small amount of chicken inside each lettuce cup. Garnish with some sesame seeds and sesame oil.