Not all vegetable biryanis are vegan. Whether biryani is truly vegan will depend on what oil and broth are used to prepare it. Many times ghee or clarified butter is used to make vegetable biryani, making it not entirely vegan. Chicken broth is also a common ingredient in vegetable biryani. In this vegan biryani recipe, I've replaced the ghee with heart-healthy avocado oil and swapped out the chicken broth with vegetable broth, making this recipe vegan-friendly.