Heat 1 tablespoon oil in a large skillet. Add onions and bell peppers and cook until tender. Remove veggies from pan and set aside. Add the other tablespoon of oil to the pan, then add turkey and cook through. Once turkey is fully cooked, add water and fajita mix and bring to a boil. Turn heat down and simmer for 4 minutes or until sauce is reduced. Add onions, bell peppers and tomatoes and stir until combined. Serve on tortillas!