You have decided to attempt homemade marzipan. Marzipan can be documented in England in the late 15th century*, which makes it a little later than the cheesecake recipe you are using, but as cheesecake has continued to be made up to the modern day you believe the combination is compatible.
You find a simple recipe based on period sources†. You just need to figure out a way to dye it red.
If you decide to use a period colouring agent, turn to Page 10.
If you decide to use modern food colouring, turn to Page 11.