3
Heat oil in heavy large skillet over high heat. Add 1 lamb rack; sear until brown, turning occasionally, about 6 minutes. Transfer lamb, meat side up, to baking sheet. Repeat with second lamb rack. [I was actually only using one lamb rack and so I seared it in my heavy oven-proof skillet, moved the lamb out, drained some of the oil — careful it's hot! — and then put the lamb back on the skillet instead of a separate baking sheet.