Line a baking sheet with parchment paper. Unroll half of one pie dough onto prepared sheet and place the Brie wheel in the center. Top with another half pie dough and seal the two doughs together. Cut 18 strips around the Brie, approximately 1/2 inch thick. Place a sausage in the strip and wrap up to resemble a flower petal or sunray. Repeat with both layers of dough so there are 36 stuffed sausages. With the remaining dough, form into two suns and two moons to create the House of Tarth shield. Attach to the top of the Brie circle with egg wash. Place baking sheet in the freezer to set pie dough for at least an hour or up to overnight.
Preheat the oven to 400 degrees. Remove prepared Brie from the freezer and brush with remaining egg wash. Bake for 35 to 40 minutes until golden. Remove from oven and allow to cool 5 to 10 minutes. Remove top of Brie, and serve with mustard.