Crush the cardamom, peppercorn slightly using a mortar and pestle. Add water to a pan and then add the grated ginger, cloves, crushed cardamom and peppercorn. Let it come to a boil on medium heat. Once it comes to a boil (it takes few minutes to come to a boil) then let it boil for 1 more minute. The color of the water will change at this point as all the spices seep through it.