In a large skillet, add butter, mushrooms, green onions, garlic, salt and pepper. Heat on medium until butter is melted and mushrooms are soft, about 3-5 minutes. Add tomatoes, zucchini and carrots and mix well. Cook for 2-3 minutes and add in basil and whipping cream. Cook 6-7 minutes or until zucchini and carrots are tender, or leave a little crunch if you would prefer that texture.