Using a sharp knife, cut 1/2-inch slits all over lamb. Insert garlic slices into slits. Brush the lamb with 1/4 cup of the olive oil and sprinkle with herbs. Place in a baking dish, cover and let marinate in the refrigerator overnight.

Preheat grill. Brush green onions with some of the remaining oil and and season with salt and pepper to taste. Grill for 2 to 3 minutes on each side until almost cooked through. Remove to a plate.

Remove lamb from marinade and season with salt and pepper to taste. Grill the lamb until the thickest part registers 135 degrees F. for medium rare, turning occasionally, about 30 minutes. Transfer to a platter and tent with foil. Let stand 10 minutes.

Brush bread with some of the olive oil and grill, cut side down for until lightly golden brown, about 1 minute.

Chop onions. Cut lamb diagonally into thin slices. Serves with green onions, aioli and tapenade.

Puree garlic, oil and sage in a food processor until smooth. Add the mayonnaise and lemon juice and process until combined. Season with salt and pepper to taste.

Combine all ingredients in a food processor and process until smooth. Season with salt and pepper to taste.