Put the rusks in a freezer bag and close it. Crumble the onions with a cake roll. Melt butter and mix with rusks. Pour into a springform pan (26 cm Ø), press down firmly and chill. Mix cream cheese, yoghurt and lime zest and juice with the whisk of the hand mixer until smooth.
Mix cake glaze and sugar in a pot. Add 150 ml water and bring to the boil while stirring. Quickly beat with the cream cheese mixture and smooth down on the base. Chill for about 3 hours. In the meantime cut the marzipan in half. Colour one part green and one red. Form and cover 4-6 spiders. Before serving, warm up the jam and pass it through a sieve. Pour into a freezer bag and seal.
Colour one part green and one red. Form and cover 4-6 spiders. Before serving, warm up the jam and pass it through a sieve. Pour into a freezer bag and seal. Cut off a small corner and grind a spider web pattern on the cake. Decorate with marzipan spiders and serve
waiting time approx. 3 hours