Preheat the oil in a large skillet over medium heat for about 5 minutes or until heated. Add steak and stir fry about 3-5 minutes or until desired level of pink
Add soy sauce, lemon juice and Worcestershire sauce. Stir to fully coat the meat
Add bell pepper, garlic powder, onion, bell pepper, zucchini, carrots and mushrooms if needed. Stir to fully combine
Sprinkle in the xanthan gum. Stir continuously for about 7-10 minutes or until the sauce has slightly thickened. Sprinkle the desired amount of shredded cheese over the meat mixture. Allow to melt for about 1-2 minutes
Line 4 medium bowls with baby spinach leaves. Place desired amount of rice substitute in the center of the bowls Top with desired amount of steak mixture. Sprinkle extra shredded cheese over the top. Serve hot