In a food processor, combine the flour, sugar, pistachios, salt, and cardamom. Pulse to mix.
Add the cold, cubed butter and pulse until the mixture resembles coarse crumbs.
Add the egg yolk and pulse until the dough starts to come together. If the dough is too dry, add ice water a little at a time until the dough forms a ball.
Shape the dough into a disk, wrap it in plastic wrap, and chill in the refrigerator for 30 minutes to 1 hour to firm up.
Roll out the chilled dough to fit into a (9-inch) tart pan with a removable bottom. Mold it into any spots it didn't cover properly.
If the tart shell feels like it's becoming too soft to work with while you're molding it into the tart pan, pop it back in the fridge for a few minutes to firm up, and it should be much easier to work with again.
Prick the crust all over with a fork. Line the crust with parchment paper and fill with pie weights or dried beans - bake for 15 minutes.
Remove from the oven, and carefully lift out the parchment paper with the pie weights. Let the tart crust cool on the side. Be very gentle with the crust while it's warm, it is very delicate at this stage. (it is completely fine for the crust to still be slightly raw, as it will finish cooking with the cheesecake)