Remove the seeds from the melon and cut into slices. Cut the flesh first from the skin, then into pieces. Wash the grapes, possibly halve and remove seeds. Mix the fruits and distribute in 4 dessert glasses
Mix Marsala, egg, egg yolk and sugar in a stainless steel bowl. Beat in a hot water bath with the whisk of the hand mixer for about 8 minutes until foamy. Spread on the fruits and serve immediately