What is the best way to: How do I caramelize nuts to eat with a nutella mousse?

Possible answers:
(A). Spread the nuts on a parchment paper, cover them with the caramel powder, put them into a preheated knife sharpener (180 Celsius) for about 7-10 minutes till the nuts are incorporated into the melted caramel..
(B). Spread the nuts on a parchment paper, cover them with the caramel powder, put them into a preheated oven (180 Celsius) for about 7-10 minutes till the nuts are incorporated into the melted caramel..
Answer:
(B).