Martha's recipe called for you to separate the dough into
two discs. If you want a large galette, combine both discs; if you want two small
ones, then keep them separate. I usually go for the gusto and make one big one. Roll the dough out on a lightly floured surface
into a large round circle. Place on a lightly buttered, small rimmed baking
sheet. Pour the plum mixture into the center (leave a two inch border on all
sides) and fold the dough up around the center of the mixture. You're creating
a window for the fruit mixture to peek through so make the window as big or as
small as you want it. Bake at 375 degrees (Fahrenheit) for 40 minutes. For smaller galettes,
shorten the time and watch so they don't burn. Remove from oven and let stand
until completely cooled.
A little note on adding nuts to your recipes: In the Midwest we add nuts to everything, I am not sure if it's a texture thing or adding more heartiness to a dish, regardless, we put nuts in everything, everything dessert that is. Here in the Pacific Northwest you don't find this quite as often, they prefer their desserts to be "female" in other words no nuts. So your choice, but I definitely prefer the texture that nuts bring to pastry dishes such as these.
~Shannon