Heat medium-sized sauté pan over medium heat, add avocado oil.

Sauté onions, garlic and red pepper 5-6 minutes until softened.

Add mushrooms to pan and sauté 3-4 minutes, until mushrooms soften.

Add walnuts, tomato paste, cumin, chili powder, salt, oregano and pepper; Sauté until tomato paste begins to caramelize slightly.

Add cauliflower florets, toss to combine with seasonings. Add water and stir to remove bits of seasonings and tomato paste from bottom of the pan.

Turn down heat, cover and cook 4 minutes.

To bowl of food processor fitted with S-shaped metal blade, carefully add all ingredients from pan.

Pulse ingredients until slightly broken down, but still chunky.

Taste and adjust seasonings, as desired.

Serve in tortillas or taco shells with extras of choice, or serve in a bowl with toppings and tortilla chips.