One of the biggest issues with puff pastry is unfolding it before it's completely thawed. Make sure you have thawed it completely according to the directions on the package so that you don't end up with cracks in the pastry. That said, it's also important to work with puff pastry while it's still a bit cold. Don't let your puff pastry sit at room temperature for more than 40 minutes before making this puff pastry tart; otherwise it may be too soft and sticky to work with.