In a large sauté pan, heat oil over medium-high heat. Add mushrooms and onions, Sauté until vegetables are soft, about 10 minutes. Add pepperoni and sauté until slightly golden brown, about 3 minutes.
Reduce heat to low and add sauce. Add zucchini and cook for 3-5 minutes or until tender. Top with shredded mozzarella cheese or grated Parmesan cheese. Serve immediately.
Recipe by Mom to Mom Nutrition at https://momtomomnutrition.com/food-and-recipes/pizza-zoodles/