Preheat the oven to 400 degrees F. Line a baking sheet with parchment paper.
Roll the pastry into a 15-inch square on a floured work surface. Use a small plate to cut two 7 1/2-inch circles. Put the circles on the prepared baking sheet. Use a small star cookie cutter to cut out 10 stars from the dough scraps to decorate the top of the pastry. Put on the baking sheet with the pastry circles and chill 15 minutes in the fridge.
Stir together the fig preserves and thyme in a small bowl.
To assemble, set the bottom half of the Brie, cut side up, in the center of one of the pastry circles. Spread the fig jam on the Brie and sprinkle with the almonds. Brush the exposed pastry with the egg wash. Top with the other half of the Brie, cut side down. Lay the second pastry circle over and gently press to form it to the sides of the Brie. Fold the bottom circle of dough over, pleating as you go, to form a border.
Brush the pastry all over with the egg wash. Arrange the cut outs on top of the brie, overlapping only slightly. Brush the cut outs with egg wash. Bake until the pastry is very crisp and deep golden, about 30 minutes.
Let cool 10 minutes before serving with the baguette and apple slices.
You can freeze your Brie ahead of time to make slicing easier and to ensure nothing oozes out while baking.