@freediverx It gave me an answer. I have never heard of “Culinary Hill” so it is not an answer I am going to risk my expensive hazelnuts experimenting with. Which is good because it says 10-15 minutes at 350F. Now, hidden in the commentary, but not in the recipe itself is the warning:
“Hazelnuts: Cooking times vary depending on which method you choose, and you can toast blanched hazelnuts (no skins) the same way. Keep an eye on your hazelnuts. They can go from zero to burnt in under a minute. Don’t walk away.”

So, the correct answer is 350° F, stir after five minutes, then keep checking every minute until done. If I had believed the 10-15 minutes, I would have set my timer for 10 minutes, checked them, and I would have overcooked the hazelnuts.

So CulinaryHill has now showed itself to be another ad-driven mess designed to make the owner money, rather than a site designed to share information with other cooks.