Step 1Sift the flour into a mound on a work surface and make a wide well in the center. Pound the butter with a rolling pin to soften it. Add the butter to the well with the salt, egg yolk and cream. Work these ingredients with the fingertips of one hand until thoroughly mixed. Using a pastry scraper or metal spatula, draw in flour from the sides and work the dough with the fingers of both hands until coarse crumbs form; they should be soft but not sticky. If they seem dry, sprinkle with an additional tablespoon of cream and continue working to form a rough dough. Press the dough together to form 2 balls, one twice as large as the other.
Step 2On a lightly floured surface, quickly knead the dough. Take a ball of dough and push it away from you with the palm of your hand, flattening it on the work surface. Gather up the dough, and repeat the action two or three times -- this distributes butter in the flour so dough becomes smooth and pliable. Shape it into a ball and cover loosely with plastic wrap. Repeat with remaining dough. Refrigerate the dough for 30 minutes.
Step 1Core, halve and dice the unpeeled apples into one-fourth-inch pieces. Toss the apples into a bowl with lemon zest and juice. Stir in the cinnamon, nutmeg and allspice. Add the grapes, candied orange peel, walnuts and dark and golden raisins and stir until the fruits are evenly mixed. Stir in the brown sugar, then the bourbon or orange juice.
Step 2Brush the tart pan with melted butter. Sprinkle your countertop with flour and roll the large ball of pastry dough to a 13- to 14-inch round. Line the tart pan with the dough, leaving about 1-inch overlap of dough at the rim. Spoon the mincemeat filling into the shell and gently flatten the top with a spatula or the back of a spoon. Roll out remaining dough to fit the top of the pie, with about 1-inch overhang, and lift it onto the pie with the rolling pin to cover the mincemeat. Trim the edges of the dough with scissors and pinch with your fingertips to seal and make a fluted edge.
Step 3In a small bowl, whisk together the egg and salt to form a wash. Brush the surface of the pie with wash. With the tip of a knife, slash the dough in a decorative pattern so steam can escape. If you like, decorate the top with leaves made from dough trimmings, brushing them with glaze. Chill the pie thoroughly 20 to 30 minutes.
Step 4Heat the oven to 375 degrees, and put a baking sheet on the bottom rack of the oven to heat. Brush the chilled pie again with glaze. Set the pie on the hot baking sheet and bake until browned and the pie starts shrinking from the side of the pan, 40 to 50 minutes. A skewer inserted in pie center should be very hot to the touch when withdrawn. (The pie can be baked a day ahead; wrap it tightly in foil and refrigerate.)
Step 5To reheat, place the pie in a 300-degree oven for 20 to 25 minutes. Let it cool slightly, then unmold onto a platter.