regarding the smart pan, if you haven't heard about it yet, check out sous vide cooking technique (there are home level devices on the market right now for it),

regarding the smart pan, if you haven't heard about it yet, check out sous vide cooking technique (there are home level devices on the market right now for it), it's essentially what you want, just it's not done in a pan (you need a dumb pan to do the finishing, but it's a quick step, not very error prone)