Finely dice the onions, garlic cloves and ginger and sauté in 25g butter. Add the rice and let it sweat briefly. Now pour in some chicken stock. Pour in a little of the broth again and again while stirring, the rice must not get dry.
In the meantime, sweat the courgette grated in the remaining 25g butter for about 2 minutes. After 15 minutes add the zucchini grated to the rice and cook for another 5 minutes. Salt and pepper. Finally stir the grated parmesan into the risotto.