Bitter summer orange jam 

I am not sure but she says she got so much of bitter summer oranges, so she decided to make jam this time.
The basic method is pretty much the same, so if you are fed up with so much citrus, how about making jam out of them?
Ingredients:
Bitter summer orange (fruit only): 23oz
Granulated sugar: 8.8oz (used 7oz first, then added 1.8oz after tasting)
Lemon: a half
Wine or whiskey: 0.35 fl oz