What is this close-up picture? (WotsThat: leek cross-section)

Question

What object is shown in this zoomed-in close-up photo?

Accepted Answer

leek cross-section. A leek's concentric rings aren't actually separate layers like an onion's—they're all connected as one continuous spiral of leaf tissue wrapped around each other, kind of like a scroll rolled up tightly. This is why leeks hold together so much better when you cook them whole, whereas onions naturally want to separate into rings.

Answer: leek cross-section

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