An authentic pad thai recipe usually has tamarind juice or pulp to give it a distinct orange hue and sweet flavor. Tamarind can be hard to find, however, depending on where you live. Try this easy vegetarian and vegan version with tofu instead. Scroll down for more thai noodle dishes to try. Note: need this vegan pad thai to be gluten-free as well? Just use a wheat-free soy sauce substitute, such as tamari or bragg's liquid aminos.