Combine the soy sauce and sugar in a small bowl. Sprinkle the cornstarch over the beef. Heat a cast iron pan to medium high heat. Add the oil, ginger, garlic and the peppers. Saute for a minute then add the beef. Stir fry the beef until done about 3 minutes. Add the soy sauce mixture and the zucchini. Season with salt and pepper according to taste. Add a little water if you want more sauce. Serve
Recipe by The Gluten Free at https://www.theglutenfree.com/gluten-free-spicy-beef-with-zucchini/