brandy (optional; St. Rémy VSOP is a good cheap brandy for this)
Steps
Zest the two oranges.
Juice the oranges.
Add the orange zest, the cloves and the cardamom pods to a tea infuser.
Add the wine, juice from the oranges, and the tea infuser to a pot over high heat until it's about to boil. (Ideally, don't let it boil.)
Remove the tea infuser.
Reduce the heat to low and taste it. If it is bitter, add half a cup of orange juice and/or another 1/4 cup of brown sugar. Simmer for about 30 minutes to let the flavours come together.
Optionally have people spike the finished product with brandy.