Prepare Jars: Sterilize mason jars by washing with hot, soapy water and rinsing thoroughly.
Prepare Ingredients: Cut your cucumbers, sweet onions, crush your fresh garlic, and split up your dill.
Pack Jars: Evenly distribute onions, garlic, dill, and grape leaves among the jars. Tightly pack cucumber slices into each jar.
Make Brine: In a medium saucepan, combine water, vinegar, sugar, salt, coriander seeds, and mustard seeds. Bring to a boil, then simmer for 2 minutes.
Fill Jars: Carefully pour hot brine into each jar, leaving about ½ inch of headspace.
Seal and Cool: Wipe rims, seal with lids, and let jars cool to room temperature.
Refrigerate: Store jars in the refrigerator for at least 24 hours before enjoying. For best flavor, wait 48 hours.
Storage: Refrigerated pickles will keep for up to 2 months.