How do I describe this crustless tart? Words don’t quite do it justice. Once it’s baking, you might be able to get an inkling of its glory from the smell wafting out of the oven. Or perhaps when it comes out of the oven – lightly browned and bubbling on the counter – you’ll realize that this meal is going to be special. But it’s when you take your first bite – your taste buds meeting luscious potatoes enrobed in rich, creamy custard, encountering tangy manchego and a bright sparkle of green onion here and there – that the swooning will truly begin.
The secret? Egg yolks. Quiches and tarts made with mostly egg yolks have a superior, custardy texture that you just don’t get in a standard whole-egg quiche. Also, despite their richness, I find that they feel lighter and more appealing than those made with whole eggs. Why? The coagulation of the egg whites yields a denser final product. Fewer egg whites? Lighter (and tastier) tart. As an added bonus, this recipe provides a wonderful way to use up those yolks you have left over after making meringues or other recipes that call for just the whites.