Make the Brine: In a large pitcher, mix the water, vinegar, salt, coriander seed, mustard seed, red pepper flakes, and black peppercorns. Stir until the salt dissolves completely. Set aside.
Prepare the Cucumbers: Wash the cucumbers thoroughly, then cut about 1/8 inch off the blossom end of each one. Slice the cucumbers lengthwise in half.
Prepare the Jars: In two clean quart-sized jars, divide the dill seed and dried garlic evenly. Pack the cucumber halves tightly into the jars, filling them up.
Strain the Brine: Stir the brine again, then place a fine mesh colander over a large bowl or measuring cup. Pour the brine through the colander to separate the liquid from the spices (brine solids). Keep both the strained liquid and the solids!
Fill the Jars: Evenly distribute the brine solids (the spices) between the two jars. Pour the strained brine liquid into the jars, making sure the cucumbers are fully submerged. The brine should reach just below the jar’s neck, leaving a bit of space at the top.
Ferment on the Counter: Cover the jars loosely with the lids but don’t seal them. Let the jars sit on the counter (out of direct sunlight) for 24 hours to start the fermentation process.
Move to Fridge: After 1 day, move the jars to the refrigerator. Let them sit for 2-3 more days, or until the cucumbers have fully absorbed the flavors and taste like pickles.
Storage: Once the pickles are ready, secure the lids tightly and store the jars in the fridge for up to 6 months.
Enjoy your delicious homemade pickles!