Preheat the oven to 475° F. Line a baking sheet with parchment paper or grease with oil.In a bowl, combine the chicken, egg white, tamari/soy sauce, and orange zest. Toss well to coat. In a separate bowl, add the cornstarch.Dredge the chicken through the cornstarch to coat. Place the chicken on the prepared baking sheet. Drizzle with oil. Bake for 8 minutes. Flip the chicken and bake another 3-5 minutes, until the chicken is cooked through. Switch the oven to broil. Meanwhile, whisk together the tamari/soy sauce, orange juice, honey/maple, chili paste, peanut butter, garlic, and ginger. Pour the sauce over the chicken, then toss to coat. Sprinkle with sesame seeds. Broil 1-3 minutes, until the sauce begins to stick to the chicken and thicken. Stuff the nori into shells (if desired). Add the chicken, then top as desired. Serve with any extra sauce from the sheet pan and/or yum yum style sauce (homemade in notes).