Preheat the oven to 400 degrees. Toss the broccoli with soy sauce, sesame oil, rice vinegar, garlic powder, ginger powder, and red pepper flakes if using. Lay out on a sheet pan in a single layer. Make sure not to overcrowd the pan for best results.
Roast for 18-24 minutes or until the broccoli is beginning to get brown and crispy. Cooking time depends on the size of the florets.
