The raw ingredients
Take a kilo of raspberries. Let's! Take a kilo of basil. Let's! Take a kilo of trout. Let's!
So far it sounds like the chorus in a Greek drama - or like a brisk march. But the raw ingredients are so very important. Outstanding raw ingredients are the true ingredients.
It's like the joke. When the midday bell doesn't chime one day the parish priest asks the bell ringer why it isn't chiming. The bell ringer replies to the parish priest that there are a number of reasons why. The priest asks what the first is. The bell has been stolen. The priest answers laconically, don't tell me the others.
Raw ingredients are exactly like this. If they're not the best, then the essence of the story is completely uninteresting.