Preheat the oven to 425 F. Prepare a parchment-lined baking sheet. On the prepared baking sheet, add squash, onion, spices and 1 tbsp of oil. Season with salt and pepper and toss well to combine. Roast on the middle oven rack for 35 min, until the squash is tender.
Meanwhile, in a high speed blender, add all ingredients for chipotle crema. Blend for 60-90 seconds, until creamy and mostly smooth. Some small bits of cashew are ok. Taste and add more chipotle, salt or lime. It should be super spicy and flavour-packed.
In a medium bowl, add cabbage and juice from ½ lime and 1 tsp oil. Season with salt and massage to soften cabbage.
To the roasted squash and onions, stir in black beans to warm through. Season with salt and pepper.
Serve tortillas, with squash and black bean mixture, some slaw and avocados. Drizzle over cashew crema and top with feta, cilantro or any other desired toppings. Enjoy!