Custard. The first dish I learned to bake was crème brulée. The simplicity of ingredients contrasting with the precision and careful preparation helped distract me from the fact I'd just failed out of my engineering studies. Meringue as well; wouldn't want to waste the egg whites!
Challah is so unfussy and easy to make absolutely stunning and glossy.
At a time I was studying sourdough and making spreadsheets for measuring hydration ratios, a friend and I opened a few bottles of wine, got way too drunk and miraculously made a challah using novelty coffee mugs as measuring cups.
A great night and good lesson.
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