Galettes are recognized in French cuisine as flat free-form pastry cakes that involve little concern for perfect measurements. The key is simplicity: dough, fruit, nuts, sugar, butter and egg.Load up this pie with a simple collection of strawberry and blueberries. Then roughly fold over the edges. Using a cast iron skillet, cook the strawberry and blueberry galette over the searing heat of the grill to infuse subtle, smoky flavor into the sweet, caramelized fruits.