Firm tomatoes (opt); 0.25'd Green peppers (opt); cubed Salt Oregano and lemon quarters *Note: Lamb meat(s) should be cut into cubes the size of walnuts. Place the lamb, sweetbreads, and kidney cubes in a large non-aluminum bowl. Make a marinade of the oil, lemon juice, wine, herbs, garlic, and pepper and pour over the meat. Marinate in the refrigerator, preferably overnight, or for at least 3 hours. Thread the meat on long skewers alternating the bay leaves with the tomatoes and peppers, if desired. Grill over hot coals or broil 15 cm from the heat, brushing with the remaining marinade and turning frequently. Season with salt and pepper, then remove the meat from the skewers to a warm platter and crush oregano over the top. Garnish with lemon quarters and serve hot.