Chop the cauliflower into chunks and place into microwave for about 8 minutes or until soft. It is easier to work with if you then let it cool a bit.
Preheat oven to 450.
Place the cauliflower and garlic into a food processor and blend, drizzle in olive oil and continue blending until cauliflower is the texture of mashed potatoes.
In a large bowl, stir together cauliflower, eggs, 1/2 cup cheese, onion powder, salt and pepper.
Spray a baking pan, 11.5" x 7", with oil and pat mixture into pan. It should be abour 1/2 inch thick.
Bake at 450 degrees for 25 minutes or until the top starts to brown.