Wash and cut the stem off your cauliflower so that it lays flat.
Add some water to a pot and place your cauliflower. Place the lid on and steam it for 10 minutes on medium-low. 10 minutes from the boiling point.
In the meantime mix your sauce. In a medium mixing bowl, add all mayo, hot sauce, minced garlic, salt, pepper, 1/4 cup asiago cheese, and piquillo pepper pesto. Mix together.
Place your steamed cauliflower onto a baking dish lined with parchment paper and slather it in your sauce and sprinkle with asiago cheese.
Bake in a preheated oven at 425 degrees for 18-20 minutes or until golden.