Toss together eggplant, green pepper, red onion, lemon juice, the 1 tablespoon olive oil, oregano, salt and pepper in large bowl.
On 4 metal 10-inch skewers, alternately thread pieces of eggplant, green pepper, red onion and sausage.
Place skewers on broiler-pan rack and broil 6 inches from source of heat or until heated through, about 12 minutes, turning once halfway through cooking and brushing with the remaining olive oil.
Meanwhile, prepare couscous according to the package directions, adding the raisins if desired. Spoon couscous onto a platter; arrange kabobs over top. Makes 4 servings.