Peel the mango. First cut the flesh from the stone. Then dice finely and mix with the lime juice.
Whisk egg and sugar with the whisk of the hand mixer for about 3 minutes until creamy. Add cream slowly.
Put the mango into 4 ovenproof glasses (each containing approx. 150 ml; approx. 8 cm Ø) and press them slightly smooth. Pour egg cream over it. Bake in the preheated oven (electric cooker: 175°C/circulating air: 150°C/gas: level 2) for 20-25 minutes.
Take it out and let it cool down for about 30 minutes.
Dust the gratinated mango with icing sugar and serve while still warm.