These are not your ordinary pickles. These are lacto fermented pickles. Lacto fermentation is more common than you might think. The technique is used to make sauerkraut as well as some real deal pickles. No vinegar is used in the process; rather, the fermentation happens purely from the salty brine and the healthy bacteria. These are super nutritious, a great probiotic source, and have a refreshing tang that boasts big flavors.
Find this recipe here: https://www.dherbs.com/recipes/recipe/the-real-deal-old-school-fermented-dill-pickles/