Peel the shallots and garlic and chop both finely. Heat the oil in a pot. Sauté shallots and garlic briefly. Add frozen peas and pour on approx. 1 l stock, add lemon peel. Simmer covered for about 8 minutes until soft.
In the meantime, wash the herbs, shake them dry and pluck the leaves. Add parsley, about half mint and about 75 g sour cream to the soup. Puree finely with a hand blender, adding some stock if necessary until the desired consistency is achieved. Season to taste with salt, pepper and lemon juice. Serve with the rest of the sour cream and mint leaves.