Peanut Butter And Raspberry Jam Galette

Cut butter into 1/4-inch cubes. Place in an even layer on a plate and transfer to refrigerator to chill.
Place the rice flour, cornmeal, salt, sugar and lemon zest in the bowl of a food processor, and pulse several times to combine. Add the butter, and egg yolks, process, until the mixture resembles coarse meal, about 10 seconds. Add sour cream and process until the dough just holds together (do not process for more than 30 seconds).
Turn out dough onto a work surface. Divide in half, and place each half on a piece of plastic wrap. Flatten each to form a disk. Wrap, and refrigerate at least 1 hour or up to 1 day before using.
For the Galette you will need only one half of the dough, the other half I keep in the freezer.
To make the filling; ground nuts with the light brown sugar and cinnamon.rnIn a medium bowl mix jam and peanut butter, add the nuts and vanilla and stir well to combine all ingredients.
Preheat oven to 375 degrees.
On a lightly floured work surface, roll out dough to a 14-inch round, about 1/8-inch thick. Transfer the dough to a shallow glass pie baking dish.
Arrange the filling on top of dough. Fold border over the filling, overlapping where necessary. Brush edges of dough with egg, sprinkle with sugar. Transfer to refrigerator and chill 15 to 20 minutes.
Bake until crust is golden brown and the filling starts bubbling, 55 to 60 minutes. Transfer baking dish to a wire rack to cool the galette. Serve warm or at room temperature.