A raw lamb is floppy. A fully cooked lamb is stiff. But there’s a sweet spot in between. Look for a gentle wobble.
Grab the lamb with tongs. Give it a little shake. If it jiggles like a happy Jell-O, it’s on the rare side. If it’s totally rigid, you’ve gone too far.
Mastering The Art Of Roast Lamb: When Is It Done? | ShunGrill
You want a subtle, sensual shimmy. It’s called the “lamb shimmy,” and it’s perfectly scientific.
