Add a little more oil to the pan and sauté garlic for 1 minute, stirring often. Add chicken broth and celery. Allow to cook for 2-3 minutes until most of the broth has evaporated, stirring occasionally. Stir in red peppers and sauté for 1 minute. Reduce heat and stir in peanut sauce, chicken, noodles, half of the peanuts and half of the green onion. Toss to combine, adding a little more chicken broth if needed. Divide among serving dishes and top with peanuts and green onion. Serve immediately.