Brigitte's brazilian nut crunch

2 c  Sugar
    1/4 ts Baking soda
  1 1/2 c  Ground brazil nuts
      1 pk 6 oz chocolate chips, melted
           . to get 1/2 cup
 
  "Grease baking sheet. In a heavy skillet, cook the sugar over low
  heat, stirring constantly until melted. Add soda, 1 cups of the nuts.
  Mix well. Turn onto a baking sheet immediately. With a rolling pin,
  roll the brittle until about 1/4 inch thick. Before the brittle is
  cool, mark into squares with a knife. When cold, spread with
  chocolate and sprinkle on the rest of the nuts. When chocolate is
  firm, break into pieces."