Hanging Piece Tactic

 Here is a position that I have filed in my head and in my chess position collection. I played with the black pieces here against Dennis Patron, my neighbor who has scored much better in our head to head battles. After a couple of moves, the game was drawn via Threefold repetition. I had 5 minutes left on my clock while Dennis had 3. We played 30/g for this game. 

How should white continue here?