Instructions

1. Preheat oven to 180C/ 350F
2. Put flour in in big bowl, and make well in center. Add butter, yolks, sugar, zest and salt to well. Mix the wet ingredients with your fingers, then slowly start mixing in the flour. Just use your hand, and eventually the heel of your hand to mush it all together until it forms a ball. This only takes a few minutes.
3. Let the dough rest for ten minutes, then push it out into a parchment-lined tart pan with removable rim. Don’t try to roll it out, just spread it out to the edges with the palm of your hand, to form an even crust.
4. At this point the crust is ready for any jam filling.
5. Filling and baking:
6. Empty out an entire jar (about 1 cup) of jam into the unbaked crust. Spread out with the back of a spoon. Place on middle rack of oven and bake for about 20 to 25 minutes.
7. Let cool completely before serving.