kiwi soup color turns brown

tal_133457

in the restourand were I work we do a kiwi soup dessert. basically we purre the kiwi with some herbs and sugar.

but the soup color turns brown after a day in the fridge. is there a way to maintain the green color of the kiwi?

thanks

Johan_Edstrom_5586

Something like fruit fresh or lemon juice or vitaminc would delay it I think, same as apple or avocados- don't think you can stop it