In a small nonstick pan, cook your egg whites and set them aside. Heat sesame oil on a large non stick skillet and add in the onions, garlic and ginger. Cook for a couple of minutes or until the onions are beginning to look translucent. Add in frozen veggies, cauliflower rice, and soy sauce. Pop in a lid and cook for about 5 minutes or until the veggies are warm and tender. Adjust seasonings. Serve and enjoy with optional toppings.