Preheat oven to 450 degrees. Line a large rimmed baking sheet with foil.
Combine lime juice, chipotles to taste, honey, garlic and salt in a blender. Process until mostly smooth. Place cauliflower in a large bowl, add the sauce and stir to coat. Transfer to the prepared baking sheet. Sprinkle onion on top.
Roast, stirring once, until the cauliflower is tender and browned in spots, 18 to 20 minutes.
Serve the vegetables and beans in tortillas, topped with cheese(omit for vegan) and garnished with cabbage, cilantro, quacamole, jalapenos and/or lime wedges