Removing the bones from a lamb leg or shoulder is an opportunity to add flavor to the inside of the roast. Leg roasts in particular are great for stuffing with a grain- or bread crumb–based mixture. Shoulder roasts have a more haphazard arrangement of muscles and will hold less stuffing; we prefer to season their interior with an herb or spice paste.
Pat dry:
To season the inside with a paste, prepare:
Spread this mixture evenly on the boned side of the meat.
To fill with a stuffing, season the boned side of the meat with:
Spoon evenly over the seasoned surface, using the lesser amount for a shoulder roast:
Tightly roll or fold the roast back together; for leg roasts, roll up the lamb starting at the longer side. Tie the roast securely at 2-inch intervals to give it a snug, compact, cylindrical shape. For shoulder roasts, be easier on yourself: They will never look tidy. Scrape any bits of paste or stuffing from the surface of the tied roast and season the outside with:
Refrigerate for at least 3 hours and preferably overnight to allow the flavors to meld.
Roast as for Roast Leg of Lamb, or Roasted Lamb Shoulder.