In a large bowl, whisk together the peanut butter through the cilantro. Cover and let sit on the counter about 45 minutes.
Heat the peanut oil in a wok over high heat. Add the diced chicken to the wok and toss to sear all over, 4 minutes. Season with salt and pepper.
Off the heat, drain any collected juices from the chicken. Then add the Thai peanut sauce and toss to coat the chicken. Taste a piece just to make sure everything feels good in your life.
Lightly toast the sliced subs. Spoon a good mixture of that awesome sloppy chicken-ness onto the subs. Top with carrots, scallions and chopped peanuts.
