Peel the skin of the mangoes and cut into pieces. Make a smooth puree with the mango flesh, lime juice and sugar in a mixer. Pour the mixture into a bowl.
Whip the cream in a bowl until stiff, then fold in the yogurt and the crushed cardamom seeds.
Keep aside 4tbs of mango puree for decoration. Mix the remaining mango puree with the cream and yogurt mixture. Pour the mixture into a serving dish and chill. With each serving drop a little of the mango puree kept aside and decorate with lime twists.