Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
     1/4         pound  sliced bacon
  3          teaspoons  unsalted butter
  8               cups  sweet onion
  8             ounces  frozen puff pastry

Preparation:

heat bacon in a skillet, over a medium flame heat and stir for 8-10 minutes, until lightly browned add butter and onions reduce flame and cook over a low flame for 60 minutes, stirring often, until onions have completely caramelized remove from heat and season with salt and pepper allow to cool completely, cover, and chill rollout pastry to a 13x13-inch square drape over an 11-inch drop-center tart pan gently fit into bottom into fluted sides run a rolling pin over the top to trim excess dough from sides place into freezer for 30 minutes remove from freezer fill crust with chilled onion mixture bake @ 425 degrees for 20-25 minutes, until golden remove from oven and allow to cool for at least 30 minutes serve warm or at room temperature

Nutritional Information:

73 Calories (kcal); 2g Total Fat; (19% calories from fat); 2g Protein; 14g Carbohydrate; 4mg Cholesterol; 5mg Sodium