Butter each sheet of phyllo dough and place in a pie plate or quiche dish, with the ends hanging over the edge. Spread half the jam in the center of the dough, top with brie and the rest of the jam. Bring the edges of the phyllo dough up over the top and seal well, using most of the remaining butter.
Turn the "package" over and brush the top well with the rest of the butter. Bake in a preheated 375 degree oven for 20 minutes. Remove and let sit for at least 20 minutes before serving with slices of French bread. This can be served as an hors d'oeuvre at a large party or as part of a brunch menu. Serves 10 or more.