Position an oven rack in the center of the oven and preheat to broil.
Slice the baguette slightly on a bias into 16 crostini. Spread a thin layer of the butter and preserves onto each slice, then place onto a baking sheet. Top each with a good pinch of the fontina and transfer to the oven to broil, about 5 minutes.
Carefully remove the baking sheet from the oven and transfer the crostini to a board or platter. Fold the salami into triangles and add one to the top of each slice. Garnish each one with a mini cornichon and serve.
