1. DO NOT use soft or ripe pears for this recipe. I made that mistake and my tart was a hot mess.
2. Try and never use a tart tin when using puff pastry. The heat has nowhere to escape and the underside of 2 tries were raw. Always place the puff pastry on baking paper and then onto a baking tray.
3. When preheating the oven, let the baking tray get hot as well and then slide the baking paper with the tart on it. This helped make sure (to some extent that my underside was cooked through)