A proper tart shell should be golden brown, uniformly thin, crispy, and have smooth, clean edges. When you bite into it, it should melt in your mouth as you chew. I’m practical when it comes to tart shells. To me, a tart shell must serve a purpose: it should carry as much fresh fruit as possible. During the summer in France, this means a punnet of ripe woodland strawberries—they taste so sweet, they could be candy—arranged on top of a layer of whipped vanilla ganache. I add as many as I can, so there’s not a sliver of ganache visible. A little strawberry jam piped on top deepens the tart’s flavor.