Slice your cucumbers into spears or if small pickling cucumbers, keep whole.
Pack them into a quart jars, super tight.
Add garlic, dill, mustard, coriander, peppercorns, and red pepper flakes in on top.
In a separate bowl, mix 2 cups of water and 2 tablespoons of pickling salt or kosher salt until it dissolves. Pour in water over cucumbers and spices into jars (or as much of the water that fits). Be sure that the cucumbers are completely submerged in the water. See recipe notes.
Loosly cover the jars with lids, place on a baking sheet or plate to collect brine overflow and store in a cool dry place to ferment for at least 3 days
After 3 days test your pickles for flavor and crunch. If to your liking, put jars in fridge to stop fermentation process.