Line an 18x12 inch sheet pan with parchment paper. Preheat oven to 400 degrees F.
Slice potatoes into 1/4" thick rounds. Place slices in large bowl. Add salt, olive oil & cayenne pepper. Stir until potato slices are evenly coated with the oil and spices.
Lay slices out in a single layer on the sheet pan. Bake at 400 degrees F for 20 minutes.
Take potato slices out. At this point, you should start to see light brown spots forming.
Use a spatula to flip each potato slice over. Put back into oven for about 10 more minutes.
Take potato slices out of oven. Add desired toppings (kale, jalapeño, Roma tomato, red onion, black beans and grated cheese) and put sheet pan back into oven for about 10 more minutes or until cheese is melted to your liking.
Take sheet pan out of oven. Add any remaining cold toppings (cilantro, avocado, Greek yogurt or sour cream, salsa). Serve!