Over medium heat in sauté mode, add oil and beef. Cook for 2-3 minutes, stirring a few times.
Add garlic and cook for another minute or two.
Add remaining ingredients, except xanthan gum and broccoli.
Place lid on top, lock in place, and make sure valve is closed. Cook on high for 13 minutes.
Cook broccoli in microwave until cooked through. When the cooking time is up, manually release the pressure. If you want a thicker sauce, remove the meat and carefully sprinkle in 1/4 teaspoon of xanthan gum. Whisk for a few minutes. If you want it even thicker, repeat the process above. I wouldn't do more than 1 teaspoon though. Add beef and broccoli to the pot and stir.
While the meat is cooking, make your fried rice. Cooking it my way takes longer, but the flavor is definitely worth it.
Serve the beef and broccoli over fried cauliflower rice. Sprinkle with sesame seeds if desired.