Preheat oven to 375°F. Place chicken in a casserole dish and pour on Lee Kum Kee Hoisin Sauce. Use a brush to cover both sides of chicken in sauce. Bake for 30 minutes or until chicken is cooked.
While the chicken is baking, cook the bacon until crisp. Set aside.
Once the chicken is cooked, remove from the oven. With two forks, shred the chicken in the casserole dish. Stir the shredded chicken in the remaining Hoisin sauce in the casserole dish.
To assemble the sandwiches, Place one piece of lettuce on the bottom of each bun. Top with tomatoes, bacon, shredded chicken, Sriracha Mayo and season with salt and pepper.