In a large skillet or saucepan, add cashews and allow them to toast for 5 minutes over medium heat - stirring frequently
While cashews are toasting, dice the onions and pepper
Add olive oil to the pan, then diced vegetables. Saute' for 5 additional minutes
Cut dates into small pieces. Be sure to remove the pits!
Add precooked chicken to the pan, then soy sauce, vinegar, and dates
Let the entire mixture simmer on low/medium heat for 10-15 minutes, until sauce thickens
If desired, cook rice or cauliflower rice to serve mixture over