Any good milk chocolate will do, but we use a thick candy bar so it looks just like foie gras.
Preheat oven to 350 degrees. Slice the bread diagonally into 1/4- to 1/2-inch slices. Place slices on a baking sheet. Break the chocolate into pieces, and place one piece upside down on each slice of bread. Place sheet in the oven, and bake until chocolate is soft and the bread is slightly toasted, about 3 minutes. Serve immediately.