In a food processor, pulse the walnuts until they resemble coarse crumbs. Set aside.
In the same food processor, pulse the cauliflower florets until they become rice-like in texture. Be careful not to over-process; you want a rice-like consistency, not a paste.
In a large skillet, heat the olive oil over medium heat. Add the crumbled tofu and sauté for a few minutes until it starts to brown slightly.
Add the cauliflower rice, walnut crumbs, soy sauce or tamari, ground cumin, chili powder, smoked paprika, salt, and pepper to the skillet. Cook the mixture for about 5-7 minutes, stirring occasionally, until the cauliflower is tender and the flavors are well combined. Adjust seasonings to taste.
Assemble the Burritos:: Warm the tortillas in a microwave or on a stovetop to make them more pliable.
On each tortilla, place a line of the cauliflower walnut tofu filling down the center.
Add a layer of your favorite toppings: cooked rice, salsa or pico de gallo, guacamole or sliced avocado, shredded lettuce or cabbage, vegan cheese, sour cream and chopped fresh cilantro on top of the filling.
Fold the Burritos: To fold the burrito, fold the sides inwards, covering the filling.Then, fold the bottom of the tortilla up over the filling, tucking it in slightly, and continue rolling the burrito until it's fully wrapped.