In a small bowl, whisk together the tamari, rice vinegar, hoisin sauce, honey, and sesame oil. In a separate small bowl, mix the cornstarch and water into a slurry. Set both aside.
Toss the chicken cubes with the cornstarch until lightly coated on all sides.
Heat 1 tablespoon of vegetable oil in a large wok or skillet over high heat until smoking. Add the chicken and stir fry for 4 to 5 minutes until golden and cooked through. Remove to a plate.
Add the remaining 1 tablespoon of oil to the wok. Toss in the dried red chili peppers, garlic, and ginger. Stir fry for 30 seconds until very fragrant.
Add the bell pepper and celery and stir fry for 2 to 3 minutes until crisp-tender.
Return the chicken to the wok. Pour in the sauce and the cornstarch slurry. Toss everything together and cook for 1 to 2 minutes until the sauce thickens and becomes glossy, coating every piece.
Remove from heat, toss in the roasted peanuts and green onions, and serve immediately over steamed rice.