Heat oven to 450F. Microwave the frozen cauliflower according to package instructions.
Place in a medium sized bowl and let cool a couple minutes.
Add egg, cheese, onion powder, salt and pepper. Combine well.
Line a cookie sheet with parchment paper or a Silpat® and divide mixture into four sections (a little over a 1/4 cup each). Use clean hands or back of a spoon to spread and flatten.
Bake in 450 degree oven for 20 minutes. Remove from the baking sheet and allow to cool.
Top with deli meat and cheese or taco meat or a hamburger patty...or anything you fancy!