I don't yet have the blessing to have this problem. Though I think I can relate.
1) We host. A lot. So rather than cooking for 4, it's 14 to 20. That's really where I get my cooking fix.
2) I've half-heartedly looked around at community events. Cook for a church, a reunion, a high school sports team. Now frankly I've found there are more hoops involved in this than worth the effort, but if you have a little time maybe that could work. I've done church cooks and school cooks.
3) What I really wish I could do was just cook a brisket, eat my share, and take the rest to the food bank, but they won't accept it.
DK