Onion Tart

On the Inspiration of Zwiebelkuchen

This tart is inspired by German Zwiebelkuchen; if you’re fond of caraway seed, add ½ teaspoon or more to the filling. The custard filling isn’t harmed by overcooking, and the flavor benefits when it’s well-colored in the oven.

dough to make one 24-cm (9- to 10-inch) flaky crust

1 or 2 onions totaling 250 to 300 gr (⅔ pound), chopped, to make about 250 ml …