Preheat oven to 300 degrees. Clean cauliflower and drain thoroughly. Chop coarsely. Place all remaining ingredients in a large bowl and beat with an electric mixer (or rotary beater) until frothy. Mix in cauliflower. Transfer to a lightly buttered 2-quart casserole dish and bake uncovered for 1-1 1/2 hours until no longer liquid, stirring mixture 1 or 2 times from the bottom as it cooks.