Place sauce ingredients in a quart jar with a lid and shake to mix. You can make ahead of time and refrigerate until needed, shaking again when you are ready to use it.
Mix cornstarch slurry in a large bowl. PLACE INGREDIENTS IN ORDER GIVEN for slurry, gradually adding cornstarch while mixing. It will look almost like peanut butter.
Add chicken pieces to coat using a fork and allow excess to drip off.
Add chicken to hot oil and fry until crispy in wok. Cook up to 8 pieces at a time.
Drain chicken on paper towel and keep warm in oven. Repeat until all chicken has been fried.
Add oil and add green onions and hot pepper and stir fry for 30 seconds.
Stir sauce mixture in and cook until thick. You will see it begin to bubble and candy. Add chicken and broccoli to sauce and mix together quickly. Cook for just 1-2 minutes and serve over rice.
if you want to keep sauce and chicken separate, do not add chicken to sauce mixture, just broccoli