Boil the eggs for about 10 minutes. Quench and peel
Wash the basil and pluck the leaves, except for 3 stems. Chop coarsely and put into a tall mixing bowl. Add vinegar and sour cream. Then puree everything with the cutting stick of the hand mixer. Stir in sour cream and parmesan. Season to taste with salt and pepper
Halve the eggs if necessary. Serve all with the basil sauce. Garnish with remaining basil