Cut the bacon into small pieces and fry until crispy. Use a slotted spoon to remove the crispy bacon pieces to a small bowl.
Fry the minced shallots in the bacon fat until translucent, picking up all the browned bacon bits from the pan. Set aside to cool slightly.
Combine the coconut flour, baking soda and salt.
In the bowl of a stand mixer whisk the five eggs together with the apple cider vinegar. Add the flour mixture and beat until combined – the mixture will be very thick.
Add the shallots and bacon fat and the shortening and continue mixing until well-combined, scraping down the sides of the bowl as necessary.
Add the bacon pieces and mix until combined.
Spoon mixture onto a baking sheet covered in either parchment paper or a Silpat.
Bake for 15 minutes until slightly browned on top.