Roast the almonds in a pan without fat until golden brown. Take them out and let them cool down. Peel oranges so that the white skin is completely removed. Remove the pulp between the parting skins.
Peel the mango and cut the flesh from the stone. Dice. Wash the grapes, dab dry and cut in half. Peel pears, quarter them, remove seeds and cut into slices. Mix sugar, rum and lemon juice.
Mix the fruits and sprinkle with the marinade. Pour into an ovenproof casserole dish. Beat egg white and salt until stiff. Add icing sugar and continue beating. Fold the almonds, except for 1 tablespoon for sprinkling, into the egg whites.
Place on the fruit, sprinkle with the remaining almonds and grill under a preheated grill for about 2 minutes. Remove and serve immediately decorated with mint.