Peel onion and chop finely. Peel the carrots with the peeler and roughly dice. Peel the ginger and dice it very finely. Heat butter (1 tbsp) in a small saucepan and fry the onion and ginger cubes vigorously. Deglaze with the broth (300 ml) and simmer for about 15-20 minutes. Pour off the liquid and mash / work through well with the potato masher. Fold in the innwer cube and season with coriander (1 teaspoon), salt 1/4 teaspoon) and pepper (1 pinch). The carrot and ginger mash is a nice side dish for many dishes.