In a large pot, place the cold water, ginger, and garlic and bring to a boil. Add the cauliflower and stir. Allow to cook for 2 to 3 minutes, until the cauliflower becomes slightly translucent. Do not overcook. Turn off heat and run cold tap water into the pot. Drain, then fill pot again with cold water and drain again. Allow all excess water to strain off. Reserve.