I thought this was really easy- 1.Re1 skewering the two knights, but then I noticed that 1....Kf6 protects the one on e5.

So, maybe 1.f4- this drives the knight back to f7...

1.f4 Nf7

If black tries 1...Ng4, then white can win the b7 pawn with 2.Nxb7 Bxb7 3.Rd7+ followed by Rxb7- by playing 1...Nf7, the knight shield the king in this line, but white can just exchange the knights...

2.Nxf7 Kxf7
3.Bc4

Pinning the knight with the main threat being 4.Rd6 winning a piece. Of course, black can protect the knight with....

3..........Re8
4.Rd6

And black is all tied up- the knight can't move, the black king can't move to any square but f6, but then the knight is pinned along the 6th rank in that case. White would have a lot of free play in this position.