It’s so easy and it’s so beautiful. Stop the show!Roll out puff pastry, slather with tart crème fraiche, and layer with chopped pancetta and thinly sliced onions and potatoes. Don’t forget we all need more thyme! Pancetta Pastela 1 sheet puff pastry, thawed8 oz. crème fraiche, room temperature¼ cup pancetta (Italian bacon), chopped1 white potato,…