This is a great quiche recipe - high in protein, which we need every day, especially as vegetarians. It is quick and relatively easy to make. All good cooks can adapt this recipe to their own requirements and availability of certain ingredients - but it tastes the best using the ones I have suggested here. If the ingredients are organic, they will be that much better.
Any variety of cheese can be substituted for the Parmesan cheese.
Cayenne pepper can be substituted for paprika.