Most of the new items are found at the Machine Room Grille, which is up on the second level near the left field foul pole. From out side, you can enter directly from the concourse near US Bank Arena. One item that I heard people raving about , is the mac & cheese with strips of steak in it. I haven't tried it yet, but this may be worth spending a few bucks on.
FYI you can only get into the Machine Room restaurant on game day with a ticket. However, the patio seating is first come first serve where you can watch the game while you eat.