Do yourself a favor. Go buy some frozen turnovers, slap some bacon jam on top, and call it a day.... Ugh, you want to be fancy? Let's do it.
Set the puff pastry out to thaw. Saute the apples in a lightly greased pan with a pinch of salt until they start to caramelize, but are still from in the center. Mix in the cinnamon and the remainder of salt. Deglaze the pan, apples included, with the apple cider vinegar. Set to low heat until the cider is near evaporated, then fold in the bacon jam. Remove from heat.
Fire the oven up to 400°F. Lay out parchment on two sheet pans.
Lay the puff pastry out on a work surface lightly coated with flour. Roll out any bumps. Cut 4 squares into each piece of pastry.
Dollop 2 tbsp of filling into the center of each piece. Brush the outer edge of each square with the whisked yolks before folding into triangles. Pinch the seams gently. Make 3 small incisions in each triangle. Brush the remaining yolks over each piece. Lay these bad boys out evenly spaced on your baking sheets.
Toss them in the oven for 25 minutes or until they are golden brown. Let cool for 10 minutes before serving.
Option: Before they are cool, top each with a piece of cheddar cheese and an American flag tooth pick!
Bonus Option: Top with sliced apple a fresh whipped cream!