Made the following substitutions:
1. chicken for beef
2. water chestnuts for red bell pepper
3. 1/2 tsp ground ginger for 1 Tbsp (we don't really like ground ginger)
4. canned green beans for fresh
5. minced yellow onion for green onions
6. brown rice for white rice
7. upped cornstarch to 1 Tbsp because didn't discard marinade, but added it back as part of the sauce
Turned out okay/good. We didn't really care for the sweetness of the sauce, but the chicken tasted good in the marinade.