Cashew Chicken + Veggie Stir Fry

Name: Cashew Chicken + Veggie Stir Fry
Cuisine: Asian, Chinese
Ingredients: 2 Tbsps toasted sesame oil (divided); 1.5 lbs. boneless skinless chicken breasts or tenders (cut into 1-inch pieces); sea salt and fresh ground black pepper (to taste (about an 1/8 teaspoon each)); 3 cloves fresh garlic (minced); 1 tsp red pepper flakes (or to taste); 1 large sweet onion (chopped); 1 red bell pepper (julienned); 2 medium carrots (julienned); 1 medium broccoli head (broken into florets); 2 medium zucchinis (cut in half on lengthways and sliced on diagonally); ⅓ cup raw cashews; 2-3 green onions (sliced); 1/4 cup coconut aminos (Bragg's liquid aminos, or low sodium soy sauce)