Preheat oven to 350 degrees. In a large bowl, combine first 7 ingredients (through cinnamon) with electric mixer. Pour into baking dish and bake for 35 to 45 minutes, or until about firm. Melt margarine and brown sugar. Add nuts and cornflakes. Spread over top of soufflé for last 15 minutes of baking. Topping should be crunchy.