Heat 2 tablespoons olive oil in a large skillet over medium high heat. Add red onions and chicken and cook just until chicken is no longer pink, about 3 minutes. Add peppers, carrots and celery and saute for 2 more minutes. Stir in pineapple and Asian Sauce and bring to a boil, then reduce to a simmer until thickened. Remove from heat and stir in peanut butter until smooth. Taste and add additional Sriracha
/Asian hot chili paste for spicier, brown sugar for sweeter.