by Jenise » Mon Dec 24, 2007 2:36 pm 
				
				John, 
The hot oven approach works well.  So does pan-searing the topside of the rack for color and then inverting the meat, and moving it to an oven set at round 400 to finish the meat--typically about 20 minutes.   Lamb racks can vary quite a bit in thickness, so you have to make adjustments as Bernie mentioned to get each one exactly right.  Do you use an instant-read meat thermometer?   For medium-rare, pull the meat at about 125 and let it rest about ten minutes before serving.  
Another way to get a good crust is to spread dijon mustard on the meat and then press it into a tray of panko bread crumbs.  The crumbs crisp up nicely--you can chop and mix your fresh rosemary with the crumbs, too.  [/u]