Actually, this move is the Lean variation, and it has been played by the Finnish Master Olli Salmensuu. And here is how to play it:
1. P-K4 Kt-QB3
2. Kt-KB3 P-KB4!?
This will derail the opponent from what they probably hoped for: a Ruy Lopez
Any other attempt other than accepting the material is insipid.
Attacking the pawn
The only defence.
Attacking the knight, but leaving the kingside exposed...
5. Q-R5 ch. P-KKt3
6. PxP Kt-KB3!!
This move is the only correct way for Black to continue
7. P-Kt7 ch. KtxQ
8. PxR=Q QxKt
(Otherwise ...B-K3! will box the queen in)
With compensation for the exchange...