Twice as long sounds about right. Optimistic even in some cases like when it calls for a sweet potato since that's irregularly shaped and needs to be pealed and

Twice as long sounds about right. Optimistic even in some cases like when it calls for a sweet potato since that's irregularly shaped and needs to be pealed and chopped and is quite hard. Maybe we need a "banana for scale" equivalent in cooking, where chopping time is defined as N times pealing a banana / chopping an onion. Or we just keep doubling the prep time of everything written in cook books, recipe websites, etc...