Slice 3 onions using a food processor and place in a slow cooker and cook on high for 6-8 hours or until caramelized to golden brown. 

Now that the onions have caramelized drain off the juices and set aside for later. 

Place onions in a large bowl to cool completely. Once onions have cooled add creme fraiche, hot pepper sauce, eggs, salt and pepper. If you feel you need a little moisture in your mixture add just a tiny bit of onion juice. You don't want too much juice or your crust will be soggy. Stir until well incorporated and place in uncooked pie shell.

Preheat oven to 375 degrees Fahrenheit. 

In a small bowl combine all the topping ingredients. Place on top of onion pie spreading out evenly to edges of crust. To avoid crust from burning cover edges with pie shield and bake in preheated oven for 35 minutes. 

Remove pie shield and bake for an additional 15 minutes or until top of pie is completed golden brown on top. 

Remove pie from oven and allow to cool a few minutes prior to serving. Garnish with bacon and chives if desired. The pie can be served warm, cold, or room temperature. 

Enjoy!