Please choose the correct solution to the question: How do I caramelize nuts to eat with a nutella mousse?

Solution1: 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.

Solution2: 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 format: solution1/solution2