Mix the brine ingredients in a saucepan over med-high heat about 5 minutes to dissolve sugar and salt. (Remove from heat so it doesn't continue to evaporate.)
Slice the vegetables (cauliflower, broccoli, zucchini, radishes, carrots, etc.) ¼-inch thin slices. Divide the peppercorns in the bottom of each jar.
Pack the vegetables with the garlic into the jars.
Pour the hot brine over the contents in the jar to just below the rim (the brine should cover all the vegetables).
Cool to room temperature, screw on the lid and refrigerate for up to 2 months.
Notes
NOTE: This quick pickling recipe is NOT for unrefrigerated shelf storage and does not include fermentation as some classic pickling recipes do. Tips & Variations
Customize the brine with more spicy flavor by adding more gochujang, or adjust the sweetness with more or less sugar.