Preheat oven to broil.
Place the cauliflower and potatoes in a medium saucepan with cold water (about 1-inch). Add a pinch of salt and bring to boil. Reduce heat and let simmer uncovered until fork tender. Takes 8-10 minutes. Drain and let cool.
Using a blender put water, apple cider vinegar, olive oil, chipolte, garlic, onion powder, and salt. Blend until smooth.
Take the cauliflower and potato and mix the chipolte sauce well. Place tortilla chips on baking sheet. Add the cauliflower/potato mix. Top with black beans cheese, red onion. Broil until cheese melted. Once out top with grape tomatoes and cilantro. Serve immediately.