Shelled pistachios are the nutritional superstar in the filling and they’re part of the avocado lime crema too. One serving of pistachios has 6 grams of complete plant protein and 3 grams of fiber, and most of the fat is the better-for-you monounsaturated kind. You can serve these meatless-tacos with a colorful build-your-own toppings bar, including diced avocado, chopped cabbage, diced bell pepper, cilantro and mint leaves, salsa and shredded cheese.