Sunday Chess Puzzle, December 19

Today's chess puzzle is more open-ended than usual.

I played white, and in this position I had the move. In the previous move, black's knight moved captured the white rook on a1. This puts black up a rook and a pawn for a knight (since white could now easily take the black knight). However, white has the possibility to play for material himself with Bb5+. Does this attack succeed in equalizing material, and if so, how much?