4 bacon slices, chopped
3 tbsp. butter
4 lb. onions, thinly sliced
Ground white pepper
1/2 of 17 1/4 oz. box frozen puff pastry sheets, thawed

Cook bacon in heavy large skillet over medium heat until golden, about 8 minutes. Reduce heat to low and add butter and onions. Saute until onions are brown and jam-like, about 1 hour. Season with salt and white pepper. Cover. Chill.

Roll out pastry sheets to 13 inch square. Fit pastry into 11 inch tart pan with removable bottom; trim excess dough. Freeze 30 minutes. Preheat oven to 425 degrees. Fill crust with onions. Bake until crust is golden, about 25 minutes. Cool slightly. Serves 6.