Put the tea and sugar in a tall mixing bowl. Boil 700 ml of water and pour it over. Leave tea to steep for about 4 minutes, then pour through a sieve and allow to cool. Drain the peaches in a sieve. Peel and chop the kiwis. Squeeze lemon.
Peel and halve bananas. Puree bananas, peaches, lemon juice and 2/3 of the green tea. Puree the kiwis and the remaining tea. First pour peach juice into 4 glasses, then carefully add kiwi juice. Decorate with mint stems.
Wait 20 minutes until the smoothie can be served.