Place milk, cream,saffron, mashed melon and sugar in a small saucepan over medium-low heat. Heat, stirring occasionally, for 5 to 6 minutes or until almost simmering (don't boil). Remove from heat. Sprinkle over gelatine. Whisk until gelatine dissolves. Set aside for 10 minutes to cool.
Pour into a pan.Cover surface with plastic wrap, then foil. Freeze for 2 hours or until frozen around edge of pan. Transfer to a bowl. Using an electric mixer, beat until mixture is light and fluffy and doubled in size. Return to pan. Cover surface with plastic wrap, then foil. Repeat freezing and beating process. Freeze for 6 hours or overnight.
Remove ice-cream from freezer. Stand for 5 minutes to soften slightly. Meanwhile, combine rockmelon,apple,grapes and passionfruit pulp in a large melon bowl. Scoop ice-cream and serve with passionfruit and mint fruit salad.
