Spread butter on one side of all four slices of bread. Place bread butter-side-down on grill pan over medium-low and spread fig jam on the top of each slice.
On two slices of the bread, layer brie, apples, prosciutto, and more brie.
Take the fig spread-only slices of bread and place them on top of the layered slices. Press down with a spatula and let grill for about 2 minutes, until bread begins browning. Then flip sandwiches over and let the other side of the bread brown and the filling get all melty.