Looking for the perfect gourmet vegetarian appetizer? Try this vegetarian and vegan pat recipe made from mushrooms and walnuts for plenty of texture and flavor. Vegetarian pat is much healthier and lower in fat than the real thing. Made with mushrooms, garlic, tofu, and walnuts, all of the ingredients in this simple pat recipe are both vegetarian and vegan, making this an appetizer suitable for just about any diet. Serve your vegetarian and vegan walnut pat chilled with bread or crackers. This mushroom and nut pat also makes a good sandwich spread for a vegetarian and vegan sandwich.