Wash the peaches, grate them dry, halve them and stone them. To garnish, cut 6 approx. 1.5 cm wide slices and set aside. Dice the remaining peaches roughly. Put them together with lime juice and brown sugar into a tall mixing bowl and puree finely with a hand blender.
Wash the rosemary, shake dry and pluck into 2-3 pieces. Pour 4 cl gin into each glass. Spread the fruit puree into the glasses. Mix gin and puree well with a straw or tablespoon.
Last but not least fill up with lemon lemonade. This will create the grandiose foam crown. Garnish the drinks with peach wedges and rosemary - happy summertime!