These mini quiche reheat from frozen beautifully. Just place on a wire rack on top of a tray and bake for ten minutes at 375F. Serve hot, straight from the oven, ideally with a side of roasted tomato salsa or something similar with a bit of kick to it.
While I think I prefer these mini spinach quiche warm from the oven, they're still very good cold, making them a great grab-n-go breakfast option. No fork necessary!