The title says it all. I’d like to have a task to recur Monday through Friday and then NOT happen on Saturday and Sunday. I can’t find any way to do this right now. Can I? If not, please add that functionality sometime in the future. 
Simply open a task, go to the tab Recurrence and choose Weekly recurrence. Then you can check all the days you want to recur.
Ah, thank you very much. Didn’t think to look in there.