Wash, peel and cut your Kohlrabi bulb. If your Kohlrabi leafs look healthy then you may use them for something else otherwise discard. Also wash peel and cut your potatoes small.
Place all the vegetable cubes into a pot, add the Juniper berries, cover with water and cook on medium heat for about 20 mins or until soft. Strain your veggies but keep the veggie stock, we will need it later. Discard the Juniper berries.
While the veggies are cooking you can slice your onion and fry it translucent with the 2 Tablespoons of Butter or Oil. Let it cool a bit.
If you are using a mixer, add all the ingredients (cooked Potato and Kohlrabi, 150 milliliter of the vegetable stock, fried onion with the butter/oil, salt, pepper, ginger garlic paste and rosemary) into a mixing jar and blend until smooth or place all the ingredients back to the pot and blend with a hand mixer.
Reheat again before serving the Mashed Potato Kohlrabi as a side.