Soooo, I am an idiot. I brewed a delicious recipe I found on this site: https://www.homebrewtalk.com/f12/cardamom-lemon-wit-beer-380511/ It's a cardamom-lemon wit brew. However during the cooking process, I totally forgot to add the lemon. I didn't realize until AFTER I kegged it and tasted it. So now it's sitting in my kegerator - it's a good beer but could be way better with a lemon flavor. Is there anything I can do to add a lemon flavor to it, in the keg? Any help is as always appreciated. As a beginner brewer, this forum has been a life saver for me. Thanks!