Put Amaretti in a freezer bag, crush it with the cake roll and mix it with cinnamon. Grease the bottom of a springform pan (26 cm Ø). Spread crumbs well on top. Stir cream cheese, sour cream and lime juice until smooth. Add sugar and stir until dissolved.
Stir in eggs and flour. Carefully fill the mixture into the tin and bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for approx. 10 minutes. Reduce the oven temperature (electric oven: 150 °C/ convection oven: 125 °C/ gas: level 1) and continue baking for approx. 40 minutes. After half of the baking time loosen the cake edge with a knife. Leave the cake to rest for 30 minutes in a switched-off oven. Let it cool down on a cake rack. Take the cake out of the tin and place it on a plate. Heat the jam, pass through a sieve and place on the cake. Keep cool until serving.
Leave the cake to rest for 30 minutes in a switched-off oven. Let it cool down on a cake rack. Take the cake out of the tin and place it on a plate. Heat the jam, pass through a sieve and place on the cake. Keep cool until serving. Decorate with lime peel and corners as desired