A tapenade of Nicoise olives, capers, anchovies, and garlic imparts regional French flavors to roasted lamb.
Preheat oven to 400 degrees. Make tapenade: In a food processor, combine olives, almonds, anchovies, capers, 3 garlic cloves and 1 1/2 tablespoons oil. Process to form a smooth paste, scraping down sides of bowl as needed, about 2 minutes.
Season both sides of lamb generously with salt and pepper. Lay meat on a clean work surface, skin side down. Spread tapenade over the top. Starting with one short end, roll up lamb in the shape of a football; secure with twine.
Place the flour on a plate; season with salt and pepper. Place eggs and breadcrumbs separately on two plates. Dredge lamb first in flour, then dip in egg, letting excess drip off. Dredge in breadcrumbs.
Place lamb in a small roasting pan, and surround with remaining garlic cloves, 1/2 cup white wine, and 1/2 cup chicken stock. Drizzle remaining 1 1/2 tablespoons oil directly over lamb.
Roast in oven until the internal temperature of the lamb reaches 130 degrees on a meat thermometer for medium-rare, 1 1/4 to 1 1/2 hours. If roasting pan becomes too dry, add up to 1/2 cup chicken stock as needed to keep garlic from burning.
Transfer lamb to a cutting board, and remove and discard twine; let lamb rest 10 minutes before slicing. Set garlic aside, and pour pan juices from roasting pan into a small bowl, skimming off fat that rises to the top.
Make sauce: Place roasting pan over medium heat. Return skimmed cooking juices to pan, and add remaining 1/2 cup wine and 1/2 cup chicken stock. Using a wooden spoon, scrape up any brown bits from the bottom of the pan as the sauce gently boils. Pass sauce and garlic through a fine sieve into a small saucepan, pressing with the spoon to extract as much garlic as possible.
Bring liquid to a boil over medium-high heat; reduce heat, and simmer gently, 1 minute. Season with salt and pepper, and serve hot with sliced lamb roast.
