Toss cauliflower florets with olive oil, black pepper, salt, and spice mix (if using); arrange cauliflower florets in the Air Fryer cooking basket.
Roast the cauliflower at 390 degrees F for approximately 15 minutes, flipping them once halfway through. (Cooking times may vary depending on the size of the florets and your desired level of crispiness. Keep an eye on them to prevent burning).
To make Vegan Queso: place the pot on the stovetop over high heat and bring the water to a boil. Once the water reaches a rolling boil, reduce the heat to medium and let the potatoes simmer.
Now, cook the new potatoes for 15 to 20 minutes, or until they are fork-tender. Once the potatoes are cooked, carefully pour them into a colander or strainer to drain the hot water. Reserve some water for a blender.
Blend cooked potatoes with the other ingredients for Vegan Queso. Blend until creamy, smooth, and uniform. (Make sure to add a little bit of cooking water for a creamier texture).
Sprinkle cauliflower with black beans and the prepared Vegan Queso.
Pop back in the oven until the cheese has melted. Remove the pan from the oven and top with tomatoes, scallions, cilantro, and chili peppers. Enjoy!