01 - Combine flour, sugar, and salt. Cut in cold butter until mixture resembles coarse crumbs. Stir in egg yolk and cold water until dough forms. Shape into disk, wrap and chill 30 minutes.
02 - Preheat oven to 350°F. Roll out dough to fit 9-inch tart pan, press in and trim edges. Prick base with fork, line with parchment and fill with pie weights. Bake 15 minutes, remove weights and parchment, bake 10 more minutes until golden. Cool completely.
03 - Heat milk until simmering. Whisk sugar, egg yolks, and cornstarch until smooth. Gradually add hot milk, whisking constantly. Return to heat and cook, stirring, until thickened. Remove from heat, stir in vanilla and butter. Cover surface with plastic wrap and chill until cold.
04 - Spread chilled pastry cream evenly in baked tart shell. Arrange raspberries in concentric circles on top.
05 - Warm apricot jam with water until melted. Brush gently over raspberries for shine.
06 - Refrigerate tart at least 1 hour before serving.