SAUCE FOR ROAST LAMB RECIPES

Steps:

• 1. Remove the lamb from the fridge 1 hour before you want to cook it, to let it come up to room temperature.
  2. Preheat the oven to 200ºC/400ºF/gas 6 and place a roasting dish for the potatoes on the bottom.
  3. Break the garlic bulb up into cloves, then peel 3, leaving the rest whole. Pick and roughly chop half the rosemary leaves. Peel and halve the potatoes.
  4. Crush the peeled garlic into a bowl, add the chopped rosemary, finely grate in the lemon zest and drizzle in a good lug of oil, then mix together.
  5. Season the lamb with sea salt and black pepper, then drizzle with the marinade and rub all over the meat. Place on the hot bars of the oven above the tray.
  6. Parboil the potatoes in a pan of boiling salted water for 10 minutes, then drain and allow to steam dry. Gently toss the potatoes in the colander to scuff up the edges, then tip back into the pan.
  7. Add the remaining rosemary sprigs and whole garlic cloves to the potatoes, season with salt and pepper, then drizzle over a good lug of oil. Tip the potatoes into the hot tray and place back under the lamb to catch all the lovely juices.
  8. Cook the lamb for 1 hour 15 minutes if you want it pink, or 1 hour 30 minutes if you like it more well done.
  9. Meanwhile, make the mint sauce. Pick and finely chop the mint leaves, then place in a small bowl. Mix in the sugar, a good pinch of salt, 1 tablespoon of hot water and the vinegar.
  10. When the lamb is cooked to your liking, remove from the oven and leave to rest for 15 minutes or so. Carve and serve with the roast potatoes, mint sauce and some seasonal greens.

Steps:

• Heat oven to 425 degrees. Use a small sharp knife to make about a dozen incisions, each about 2 inches deep, through the fat that covers the top of the meat. Using a mortar and pestle or a blender, blend 2/3 of the anchovies (or 2/3 of the mustard if using), the rosemary leaves and the garlic cloves into a chunky paste. Using your fingers, press paste deeply into incisions.
• Mix remaining anchovies (or mustard) and the butter into a paste. Smear this mixture all over the surface of the roast. Season liberally with black pepper. (Do not add salt; the anchovies are salty enough, and so is the mustard.) Place the lamb on a rack in a roasting pan, fat side up, and squeeze the lemon halves over. Pour the wine around the roast into the pan.
• Roast 15 minutes, then reduce heat to 350 degrees and roast until internal temperature reaches 130 to 135 degrees (for medium-rare or medium meat), about another 60 to 90 minutes. Baste every 20 minutes or so with the wine and drippings in the pan, adding more wine as needed to keep the liquid from scorching. If possible, for the last 15 minutes of cooking, use convection or a broiler to crisp the fat on the roast.
• Remove pan from the oven, remove rack from the pan, and let the roast rest on the rack for at least 15 to 20 minutes in a warm place, tented with foil. The internal temperature will rise to about 140 to 145 degrees.
• To make sauce from the pan drippings, remove a few tablespoons of fat by tipping the pan and spooning off the top layer. Put the pan over medium heat until the liquid simmers. Taste the simmering liquid and whisk in more wine, 1/4 cup at a time, until the consistency and flavor are right. Do not let the mixture become syrupy; it should be a sharp jus, not a thick gravy.
• Carve lamb into 1/2-inch-thick slices and arrange on a heated platter, decorated with rosemary sprigs. Serve with piping hot gravy.