Preheat your oven to 400°F (200°C). Line a large baking sheet with parchment paper for easy cleanup and even roasting.
Spread the cauliflower florets evenly on the prepared baking sheet. Drizzle generously with extra-virgin olive oil and season with a pinch of sea salt and freshly ground black pepper. Toss well to ensure each floret is lightly coated.
Over the baking sheet, crumble two chipotle peppers by hand and drizzle in some of the adobo sauce from the can. Mix thoroughly, allowing the bold, smoky flavor to coat the cauliflower evenly. Roast for 25 to 30 minutes, or until the florets turn golden brown and crisp at the edges, stirring halfway through for even browning.
Meanwhile, prepare the chipotle yogurt sauce. In a small food processor or blender, combine Greek yogurt, one chipotle pepper, garlic clove, lime juice, olive oil, honey, and a pinch of salt. Blend until smooth and creamy. Taste and adjust the seasoning—add a bit more lime juice, salt, or pepper if desired for extra brightness or balance.
To assemble, spread a spoonful of chipotle yogurt sauce over each warmed tortilla. Add a generous scoop of roasted cauliflower and top with avocado slices. Serve with sprigs of fresh cilantro and lime wedges on the side for squeezing just before eating.