You either can brown them more before adding sauce, make sure they're seared all the way around before adding sauce. OR, throw them in the oven after searing for about 10 minutes at 350-400. Then add the sauce, cook down and enjoy.Maybe try smaller balls? They should cook faster.
+ByronTalbott it just sounds muted (like staged, if that even the right thing to say). Don't hate me ;) but i don't wanna discouraged you from using it either.