1. Place chocolate in a small bowl. In a small saucepan, bring cranberry sauce and cream just to a boil. Pour over chocolate; whisk until smooth. Cool to room temperature, stirring occasionally. Cover and refrigerate for 3 hours or until firm enough to shape.
2. Combine confectioner's sugar and cocoa. Shape truffle mixture into 1-in. balls. Roll in cocoa mixture, then in pistachios. Store in an airtight container in the refrigerator. Yield: about 2-1/2 dozen.