In a bowl, mix flour, sugar, and salt. Add the butter and rub it in until the mixture looks crumbly. Add cold water a little at a time until it comes together. Shape into a disc, wrap, and chill for 30 minutes.

On a floured surface, roll out the dough into a circle about 12 inches wide. Place it on a baking sheet lined with parchment paper.

Sprinkle walnuts over the dough, leaving a 2-inch border. Arrange the figs on top, cut side up. Drizzle with honey, add vanilla, and sprinkle with brown sugar and cinnamon if using.

Fold the edges of the dough over the filling to create a rustic border. Brush the crust with beaten egg.

Bake at 375°F (190°C) for 35–40 minutes, until the pastry is golden and figs look soft and caramelized. Cool slightly before serving.