Wash your jars well with soap and warm water. Prep your fruits or veggies by trimming, slicing, or peeling. Add your flavors to the jar. Pack your produce in tight, leaving half an inch at the top of the jar. Make your brine by boiling salt, vinegar, and optional sugar, then pour over produce. Tap out bubbles, tighten lid, and let sit for at least 48 hours.