4 heads broccoli (about 1 1/2 pounds), stalks roughly chopped and separated from florets
2 tablespoons extra-virgin olive oil 
Kosher salt and freshly ground black pepper
1/2 cup coconut liquid aminos, such as Big Tree or Coconut Secret (see Cook's Note)
1/2 cup orange juice
2 tablespoons arrowroot starch/flour
1 tablespoon toasted sesame oil
1/4 to 1/2 teaspoon crushed red chile flakes
2 cloves garlic, finely grated
One 2-inch piece fresh ginger, finely grated
2 large boneless, skinless chicken breasts (about 1 1/4 pounds), cut into 1-inch pieces
4 scallions, sliced
Toasted sesame seeds, for serving

Note: Coconut liquid amino acids are made from the sap of certain coconut trees and adds a savory flavor to dishes. The product is packed with not only amino acids but also vitamin and minerals. Look for it in specialty markets or online.