Heat a toastie maker, or a small griddle pan. Butter each slice of bread on one side, then spread the other side of one slice with fig jam, and one with mustard. Top the fig jam with Brie and ham, sandwich with the remaining bread, butter-side up, then place in the toastie maker or the griddle pan. If cooking in a pan, squash down a little with the back of a fish slice while cooking, flip over after 2-3 mins when golden, then cook on the other side. Serve with a handful of salad leaves on the side, if you like.