· Heat the milk and cream in a saucepan.
· Whip the egg yolks and sugar in a mixing bowl until the mixture whitens.
· Sieve the corn-starch and blend it into the sugar-and-eggs mixture.
· Add the milk and cream, which should still be hot.
· Pour the mixture into a saucepan and continue to stir until it thickens.
· Off the hob, add the crushed chocolate and go on stirring.
· Pour into the pots and stand them in the refrigerator for at least 3 hours.
· Peel the mangoes and cut off the flesh.
· Blend the lemon and mangoes until you get a nice smooth coulis.
· Put in the refrigerator.
· Pour the mango coulis over the chocolate cream just before serving.