Preheat the oven to 400 degrees F.
Toast the pumpkin bread for about 6 minutes. Allow the bread to cool then spread each slice with a thin layer of apricot jam. In a small bowl, mix the remaining jam with the mustard fruits and smoked chicken. Spoon chicken mixture onto each slice of bread. Cut the sandwiches in half diagonally (corner to corner) and arrange on 4 plates. Garnish with the plums, if desired, and serve.
Mustard fruits are available at gourmet markets and Italian specialty stores.
This recipe was provided by a chef, restaurant or culinary professional. It has not been tested for home use.