As Queentina said, stew and roast chicken earn more coins than any other food. Some players prefer to earn coins as opposed to collecting parts. The reasoning is that they can always request the parts from their neighbours when they need to build something, but they can't request coins.The other part to your reply confuses me, though. I don't think how fast a dish cooks would be correlated to them asking for food when they already have it bec they don't need to make more quickly when they already have it.