Crust: On a lightly floured work surface, roll pate brisee into a 13-inch round. With a dry pastry brush, sweep off excess flour; fit dough into a 10-inch round fluted tart pan with a removable bottom. Fold edges toward center to reinforce; press into sides of tart ring. Pierce bottom of tart shell all over with a fork. Cover with plastic wrap; freeze until firm, about 15 minutes.
Preheat oven to 375 degrees. Uncover and line tart shell with parchment and fill with pie weights or dried beans. Bake until edges are set and golden, about 20 minutes. Remove weights and parchment and continue baking until bottom of crust is dry and golden, 15 to 20 minutes. Remove from oven and let cool completely on a wire rack.
Filling: Place cold water in a small bowl. Sprinkle gelatin over water; let stand until softened, about 5 minutes. Combine cranberries, sugar, jelly, and cognac in a saucepan and cook over low heat 12 to 15 minutes. Do not overcook or the mixture will become too watery; cranberries should be soft but not bursting. Remove from heat and let cool slightly. Stir in gelatin and let cool completely.
Pour cranberry filling into tart shell and chill for at least 1 hour before serving.