Sprinkle 1/2 cup nuts in a 9" square on Sil-pat or buttered baking sheet, foil, or waxed paper
Butter the top edges of a 2-qt. microwave safe casserole - I use my batter bowl with handle.
Put in butter, salt, sugar and water. DO NOT STIR!
Put the dish in the microwave on high for 6 to 8 minutes. Check mixture at 7 minutes and continue cooking a minute at a time until the mixture just begins to turn tan. You need to watch it here and remember DON'T STIR!
Pour the mixture over the pecans. Immediately sprinkle the chocolate on top and let sit for 1 minute.
After 1 minute use a spatula to spread the chocolate. Sprinkle remaining nuts over the top - press down as much as you can. Put in refrigerator to cool completely. Break into small pieces.