Objective: How can I roast hazelnuts?

Which of the following solutions is more sound in terms of naive physics reasoning?

pick from the following. -- Place the hazelnuts in a single row on a cookie sheet and place in a 300-degree oven for 150 minutes.; -- Place the hazelnuts in a single row on a cookie sheet and place in a 300-degree oven for 15 minutes.;
Place the hazelnuts in a single row on a cookie sheet and place in a 300-degree oven for 15 minutes.