Cut each slice of bread into 4 squares.
Melt the butter in a skillet over medium heat and toast the bread in the skillet, about 2 minutes per side. Smear each toast with 1/2 teaspoon of apricot jam (or more, according to your own taste).
Using a sharp knife, cut the chocolate into thin shards. Top each toast with a couple of shards. Turn on the broiler and place each toast on a baking sheet. Slide under the broiler for 1 1/2 minutes to 2 minutes, or until the chocolate begins to melt.
Serve warm from the oven.