Cheesy Cauliflower Nachos

Name: Cheesy Cauliflower Nachos
Cuisine: American, Mexican, Latin American
Ingredients: 1 large cauliflower head (cut into 1 inch thick slices); avocado oil (or olive oil); sea salt and freshly ground black pepper; 1/2 tsp onion powder; 1/2 tsp garlic powder; 1 cup black beans (drained and rinsed); 1/2 cup organic corn (fresh or frozen); 1 cup chopped grape or cherry tomatoes; 1/4 cup diced red onion; 1 jalapeño (seeded and sliced); 1 cup shredded Mexican cheddar cheese; plain Greek yogurt for serving; 1/4 cup chopped fresh cilantro for serving