RHUBARB-STRAWBERRY TART

Steps:

• Crust: Lightly beat yolk and 2 tablespoons ice water in a small bowl until combined.
• Pulse flour, sugar, and salt in a food processor to combine. Add butter and process until mixture resembles coarse meal, about 15 seconds. With machine running, add yolk mixture in a slow, steady stream. Pulse until mixture holds together; if dough is still too dry, add additional ice water, 1 tablespoon at a time. Shape dough into a disk and wrap in plastic. Refrigerate until firm, at least 30 minutes and up to overnight.
• Preheat oven to 375 degrees with racks in middle and bottom. Coat bottom and sides of a 9-inch springform pan with cooking spray. Let dough stand until pliable. On a lightly floured surface, roll out dough slightly thicker than 1/8 inch. Cut out an 11-inch round. Fit into bottom and up sides of prepared pan. Freeze 15 minutes.
• Filling: Stir together rhubarb, strawberries, sugar, cornstarch, salt, and lemon juice in a large bowl. Pour into tart shell. Bake, with a foil-lined rimmed baking sheet on bottom rack to catch juices, until bubbling in center, about 1 hour, 15 minutes. (If browning too quickly, tent with foil during last 15 minutes.) Remove from oven. Release sides of pan immediately. Let tart cool on pan base on a wire rack before cutting into wedges and serving warm or room temperature.