Place all washed and chopped vegetables into large container. Container should be large enough to easily submerge all vegetables in liquid, and be weighted down (causing liquid to rise.)
Place all ingredients of pickling liquid into large pot, and bring to a boil.
Once boiling, remove pot from heat and carefully pour hot liquid into container with the vegetables.
Place parchment paper over vegetables, and then weigh down vegetables with a heavy plate or bowl. You just need to make sure that no vegetables are floating up and over the liquid to ensure an even pickle. Allow to cool at room temperature for about an hour.
Once cooled down slightly, place into fridge, and allow vegetables to chill and sit for a few days before serving. Giardiniera will meld and improve in flavor as it sits!