It was!
The recipe is Swiss, from a popular series of cookbooks called Betti Bossi, I believe Germans and Austrians have versions as well.
Wähe (pronounced vai-hey) is the base recipe, and the sweet ones are lovely and custardy. There are also savory versions that are more quiche-like.
Grandparents are valuable, and women tend to be smaller and require fewer resources to provide wisdom and babysitting.
Source: the top of my head.