I personally like to chill this tart thoroughly before serving it. The purpose is to allow the custard to be set properly so that it can be sliced cleanly. It also allows the flavors to get friendly with each other and combine. u003cbr/u003eu003cbr/u003eIf you are less of a perfectionist or less patient, you can serve this tart straight out of the oven, but please allow it to rest for at least 15 minutes to cool and rest.