There are lots of quiche recipes but this is the original, traditional ‘quiche lorraine’ from the Lorraine region in eastern France which doesn’t include cheese! But once you have the basic quiche you can then add whatever you want : cheese, onions, leeks, courgettes etc depending on your tastes. It is perfect served warm with a side-salad.
You’ll need a pâte brisée for this recipe, which is simply the french version of a pie or tart pastry. I think its known as short cut pastry in english (open to corrections on that!)