Place bacon on the baking sheet in single layer and bake for 15 minutes, turn over and bake for additional 5-10 minutes.
Peel, core and thinly slice 1-2 apples and sate with 2 tbs bacon fat or oil with a pinch of sea salt for couple minutes, put on the side.
Cut leeks into a ½ inch and wash. Sauté with 2 tbs bacon fat, add 2 sprigs fresh thyme, freshly ground black pepper, salt and 1/2 -1 tsp chilli flakes if using, after 2-3 minutes add 1 cup 35% cream. Cook to reduce the cream by at least half or more for a thicker sauce.
Speed sauce over the dough into thin layer.
Next, put a layer of sautéed apples and bacon cut into 1-inch pieces.