When you first take your homemade quiche out of the oven, always be patient. While the quiche is still warm it will continue its cooking process. u003cbr/u003eu003cbr/u003eYou may notice that the exterior of the quiche will cool down first.u003cbr/u003eu003cbr/u003eAfter around 10 to 20 minutes you can cut the quiche. This allows the quiche to be at its optimal temperature to allow it to be cut properly.