Creating Cauliflower Tinga Tacos is a straightforward process. Follow these steps to achieve delicious results:

1. Preheat Oven: Start by preheating your oven to 400°F (200°C).
2. Prepare Cauliflower: In a large mixing bowl, toss the cauliflower florets with olive oil, cumin, smoked paprika, chili powder, salt, and pepper until evenly coated.
3. Roast Cauliflower: Spread the seasoned cauliflower in a single layer on a baking sheet. Roast for 25-30 minutes, or until tender and slightly caramelized, flipping halfway through for even cooking.
4. Sauté Aromatics: While the cauliflower roasts, heat a skillet over medium heat. Add diced onions and sauté for about 5 minutes until translucent. Stir in minced garlic and cook for an additional 1-2 minutes.
5. Combine Ingredients: Once the cauliflower is done, add it to the skillet with the onions and garlic. Pour in the fire-roasted tomatoes, chipotle in adobo sauce, and lime juice. Stir to combine all the ingredients well.
6. Simmer: Allow the mixture to simmer for about 5-7 minutes, letting the flavors meld together. Adjust seasoning if necessary.
7. Warm Tortillas: While the filling simmers, warm the corn tortillas in a separate skillet or over an open flame for a few seconds on each side until pliable.
8. Assemble Tacos: Spoon the cauliflower filling onto each tortilla, then top with fresh cilantro, avocado slices, and red onion.
9. Serve: Optionally sprinkle with feta or vegan cheese before serving. Enjoy immediately!