Add sliced beef Chinese five spice and cornstarch in bowl, combine and set aside in tightly seal container in the refrigerator.

In a small bowl combine soy sauce, brown sugar, garlic, teriyaki sauce and red pepper flakes.

Add oil to a wok or large skillet and heat on high.

Add steak into the pan and stir-fry, separating pieces and stirring constantly until the majority of the pieces have some golden or crispy edges on them. This should take approximately about 3-4 minutes.

Add broccoli, cook 1-2 minutes until crisp-tender.

Add sauce, and cook, stirring constantly for about 1 minute until sauce slightly thickens.

Adjust seasoning with salt and black pepper if needed. Serve with rice.