Boost the umami factor in vegan cooking. Vegetarian fish sauce gives foods a savory and deep taste. In Vietnam, it's called Nuoc Mam Chay and can replace traditional fish sauce in any recipe, such as green curry, pad thai, and dipping sauce for fresh spring rolls. Use it in marinades for tofu or tempeh, in the dressing for rice noodle salad, or in fried rice. Add a dash to a Bloody Mary or a Caesar cocktail.