A cast iron pan is, quite literally, a big hunk of iron molded into the shape of cookware. 

Hunk 塊

Indeed, we don’t do anything complicated to keep our pans in tip-top nonstick shape.

tip-top excellent

Convolute kάnvəlùːt 巻き込む

. The oven temperatures they use are equally varied, and some advocate convoluted methods that involve repeatedly changing the oven temperature during the seasoning process.

 But they can also expose just how little agreement there often is among experts when you get down to the nitty-gritty details

Nitty-gritty details 肝心の詳細

https://www.seriouseats.com/2016/09/how-to-season-cast-iron-pans-skillets-cookware.html

cast iron 鉄製

seasoned a new cast iron frying pan.

https://www.seriouseats.com/2016/09/how-to-season-cast-iron-pans-skillets-cookware.html

How to Season a Cast Iron Pan (It’s Easier Than You Think!)