Mia, your tart is wonderful! and funny!
I used about 2 cup of wine with 5 tablespoon of sugar according the amounts (usually milk) suggested by my vanille curd package. It was really the right amount for us.
My daughter was exited to try the cake and my husband really stunned! It came out perfecty and delicious after 100 minutes by 150?C.(300?F).
How is with a Christmas version with "Gluehwein" (spiced wine)? I will try this for sure!