Preheat the oven to 400°F.
Line a sheet pan with parchment paper. Set aside.
Remove the stem of each fig and cut them in quarters through the stem downward.
On a floured board, roll the dough to a rectangle to about 14 inches. Wrap the dough around your rolling pin and transfer it to the prepared pan. Trim the dough with a knife to create straight edges. Put the pan back in the refrigerator for 20 minutes.
Place the figs in a preferred design onto the dough and scatter on the blueberries.
Sprinkle evenly with the full cup of sugar.
Bake for 45 minutes to 1 hour, or until the pastry is browned and the fruit starts to brown. Rotate the pan once during baking.
Remove the tart from the oven and immediately transfer it to a board or a clean piece of parchment.
In a small saucepan, heat the peach jam with 2 tablespoons water and brush the fruit and pastry completely with the mixture.
Let the pastry cool, cut into squares, and serve warm or at room temperature.