You can put potatoes in water that’s already boiling. It’s fine.
iirc there’s some (mainly textural) differences that make having potatoes stay somewhat below boiling for a bit better.
I think the point is that the cooking process starts well before boiling temp. Potatoes take a lot longer to cook than corn so you would want to take advantage of that fact. Where corn cooks a lot quicker you would want to have a shorter cooking time to preserve the fresh flavor and texture so already boiling water helps that.
Same for carrots
Steam is also your friend!
Wel this is a bunch of nonsense.
Can someone explain why this is?
If you put some faster to cook stuff in cold water it might cook at a different rate or get soggy
No idea why you’d have to start potatoes in cold water though, maybe putting them in boiling water makes your nipples fall off?