1. For mousse: Line 12-cup ring mold with plastic wrap, allowing plastic to overhang edges by 3 inches. Whisk first 6 ingredients in large metal bowl to blend. Set bowl over saucepan of simmering water (do not allow bowl to touch water); whisk until candy thermometer registers 180°F, about 7 minutes. Remove bowl from over water. Using electric mixer, beat mixture until cool and thick, about 8 minutes.
2. Beat cream in another large bowl until stiff peaks form. Fold cream into egg mixture. Spoon into mold; smooth top. Cover and freeze overnight. (Can be prepared 1 week ahead. Keep frozen.)
3. For fruit: Toss strawberries with sugar in large bowl. Let stand 20 minutes. Add mangoes, raspberries, blackberries and blueberries; toss to coat.
4. Turn frozen mousse out onto platter. Peel off plastic. Smooth top and sides with metal icing spatula. Mound some fruit in center of mousse. Garnish with lime- and lemon-peel twists and mint. Serve, passing remaining fruit separately.