Harvested at their peak as they ripen in the summer sun, these seasonal stone-fruits present a firmer flesh that's great for the grill, chopped up in salads, or as a snack. Slice them and serve with yogurt for a satisfying breakfast, or spoon them over vanilla ice cream for a juicy dessert.  While it's hard to resist nectarines when they're fresh, you can extend summer's bounty by freezing them for later use in baked goods or smoothies and enjoy a burst of summer sunshine in the cool winter months.