Line six troughs of a muffin baking tray with paper baking cups. Drain the apricots well. Put 6 apricot halves aside and puree the rest. Put 20 g meringue in a freezer bag and crumble finely.
Whisk egg and sugar with the whisk of the hand mixer for 6-8 minutes until thick and creamy.
Carefully stir apricot puree, meringue and lemon juice into the egg cream. Whip the cream until stiff and fold in. Spread the mixture into the paper baking cups and freeze for at least 4 hours, preferably overnight.
Chop the chocolate and melt in a hot water bath. Spread liquid chocolate on the parfaits and cover with the remaining apricots. Crumble 2 meringue tuffs. Decorate parfaits with them and serve immediately.