This recipe for Italian-style giardiniera can be changed up to suit your taste; it is, however, important to maintain the correct brine ratio to ensure safety.
In a nonreactive pot, combine 4 cups of water with 2 tbsp of kosher salt, pickling salt, or sea salt. Warm to dissolve the salt and then set aside to cool.
Place the mixed vegetables, garlic, bay leaves, yellow mustard seeds, black peppercorns, and fennel seeds in a mason jar and pack down tightly. Apply fermenting weight, if using.