In a nonstick pan on medium heat, heat both oils. Add in the peppers, onions, mushrooms, and celery. Saute for 4 - 5 minutes. Add in the ground turkey, garlic, and ginger and cook breaking the turkey up into smaller pieces until it is no longer pink. Stir in the chicken broth, soy sauce, and cornstarch; bring to a low simmer for about 6 minutes.