Stir the almond flour into the melted cheese.

Let the mixture cool briefly so it's warm but not hot, then add the egg. If the cheese is too hot the egg will cook.

Stir until combined, then knead by hand until no dry flour remains.

Press the dough into a flat rectangle about ½ inch thick between two sheets of parchment paper.

Cut rounds using a biscuit cutter or the rim of a drinking glass. Re-press and cut the scraps.

Spray the rounds with cooking spray and air fry at 400°F for 7 minutes. Flip and air fry 7 minutes more, until browned and firm.

Let the buns cool for 2 minutes, then brush the cut sides with sugar-free maple syrup.

Stack each sandwich with a sausage patty, a cheese slice, an egg and two strips of bacon.

Return to the air fryer for 30 seconds if you'd like the cheese fully melted, then serve warm.