Boris Mann 5th September 2022 at 3:51pm
To each quart of water that has been boiled and brought to room temperature, add ¾ cup of distilled white vinegar and 4 Tablespoons Kosher salt
A quart is 0.946 liters.
Also from the same blog, add some pickling spices to taste in each jar:
Generally speaking, most recipes include some proportion of the following ingredients: bay leaves, chilies, cloves, cinnamon stick, ginger, allspice, mustard seed, coriander, black pepper, mace, and cardamom.
The article also has links to a handful of specific recipes.
Cover jars with plastic wrap for 2-3 days “until soured” and then put them in the fridge.
Link: https://awaytogarden.com/dan-koshanskys-refrigerator-pickles/