In a saucepan, combine the egg, sugar and salt. Gradually add milk. Cook and stir over medium heat until mixture reaches 70 degrees C and coats the back of a metal spoon. Remove from the heat. Whisk in chocolate, then add cream, coffee and vanilla. Refrigerate for at least 2 hours.
Fold in Dime bars and nuts. Fill cylinder of ice cream freezer; freeze according to manufacturer's directions. Allow to become firm in the freezer for 2 to 4 hours before serving.