For the yogurt ice cream with strawberry-mango salad, boil the juice of one lemon and sugar and stir until the sugar is dissolved.
Let cool briefly, then mix with the yogurt. Chill and freeze in the ice cream maker just before serving.
Quarter the strawberries and place in a large enough bowl. Peel and dice the mango. Mix with the strawberries and marinate with sugar and liqueur.
Arrange the ice cream with the strawberry-mango salad and serve.