Glyko Karpouzi is a fruit preserve made with the rind of the watermelon (karpouzi in Greek pronounced Glee-KHO kar-POU-zee), so whenever you get a thick skinned watermelon, you can use the rind to make this sweet fruit preserve.
Glyko Bergamonto or Bergamot fruit preserve is one of the most delicious and aromatic Greek fruit preserves (glyka tou koutaliou in Greek).
Kitromilaki or Nerantzi Glyko, is a fruit preserve made with Seville Oranges when they are small and the seeds have not yet developed inside.
How can we tell if the syrup is ready? That is a good question. There are several methods, old and new, to tell if the syrup has the right density.