How to Prepare Nectarines:
Wash nectarines just before you are ready to eat or cook with them. Then cut your nectarine lengthwise around the stone (follow the natural seam around the fruit) and gently twist both halves in opposite directions to separate them. If you can, pop out the stone.
For clingstone varieties, you may need to cut around the stone. The best method to do this is to cut slices around the stone and gently pluck off the slices. To remove the pit from the last remaining piece you may need to simply trim around the stone.
To prevent browning, simply coat sliced nectarines with lemon juice or fruit preservative immediately after slicing.