Preheat oven 400DegreesF. Mix chili powder, cumin, garlic powder, onion power, salt, lime juice, olive oil and water in a small bowl. Place cauliflower and chickpeas on baking sheet. Pour spice mixture on top and toss until everything is well coated. Roast for 30 minutes stirring occasionally. Cauliflower should have crisp edges.
While veggies are roasting, make the crema. Place yogurt, lime juice, red pepper flake and cilantro in small bowl and combine well. Add salt and pepper to taste. Add more yogurt if crema is too runny for your liking.
To assemble taco place some cauliflower mixture on a corn tortilla. Top with a little cabbage, avocado, cilantro leaves and drizzle with crema. Prepare to enjoy one of the best veggie tacos ever!
Recipe by pretty plain janes at https://prettyplainjanes.com/2015/07/30/roasted-cauliflower-chickpea-tacos/