Preheat oven to 375.

In a food processor or with a box grater, coarsely grind the cauliflower and onion.  Transfer to a bowl and add all remaining ingredients.  Mix well with hands.

Spray a 9x13 souffle pan with cooking spray.  Transfer cauliflower mixture to the pan and bake for about 40-50 minutes until top begins to turn golden brown.

This kugel freezes well and reheats well.