Check with a knight when the king is surrounded.
In smothered mate, the king’s own pieces occupy its escape squares and a knight gives check. A knight check cannot be blocked. Mate still requires that no piece can capture the knight.
Take the pawn
Your knight can take the pawn. If the rook recaptures, you can take it with your queen and gain more material.
2 more clean runs (at any point) to reach Recall.