Maytag Blue Cheese and Potato Tartlets

Blend together flour, salt, and butter with your fingertips or a pastry blender (or pulse in a food processor) just until mixture resembles coarse meal with some small (roughly pea-size) butter lumps. Drizzle evenly with 3 tablespoons water and gently stir with a fork (or pulse in processor) until incorporated. Squeeze a small handful of dough. If it doesn't hold together, add up to 1 tablespoon more water, stirring (or pulsing) until just incorporated, then test again. (Be careful not to overwork dough, or pastry will be tough.) Turn out dough onto a lightly floured surface and divide into 6 portions. With heel of your hand, smear each portion once or twice in a forward motion to help distribute fat. Gather dough portions together with scraper and press into a ball, then flatten into a 6-inch disk. Chill, wrapped in plastic wrap, until firm, at least 30 minutes.