Gruyere, love me some on homemade French onion soup.
I remember reading ‘Heidi’ when I was a kid, and drooling over the description of the Grandfather’s ‘grilled cheese’:
https://www.chowhound.com/post/cheese-detectives-cheese-featured-heidi-873259
That is my weakness! It is so expensive & I eat giant chunks. That salty, tangy, nutty.........oh my....hunk of goodness. Now I’m hungry & we just ate......