Combine marinade and dressing ingredients in small bowl. Place steaks and 1/4 cup marinade in a food-safe plastic bag; turn steaks to coat. Close bag securely and marinate in refrigerator 15 minutes to 2 hours, turning occasionally. Cover and refrigerate remaining marinade for dressing.

Preheat charcoal grill to medium heat.

Remove steaks from marinade; discard marinade. Place steaks and bell peppers on grill over medium, ash-covered coals. Grill steaks, uncovered, 9 to 11 minutes for medium-rare to medium doneness, turning occasionally. Grill peppers, covered, 7 to 10 minutes or until tender, turning occasionally. A few minutes before steaks are done, place bread slices on grill. Grill until lightly toasted, turning once. Cut 1 end off garlic clove; rub cut end evenly over both sides of toasted bread.

Carve steak into thin slices; season with salt and black pepper, to taste. Dice bell peppers. Place 1 bread slice upright in each of 6 (1-cup) martini glasses. Layer with equal amounts of spinach, peppers, steak, olives, chopped cilantro and reserved dressing. Top with cheese shavings. Garnish with cilantro sprigs, if desired.

Cook's Tip: To prepare on gas grill, preheat grill according to manufacturer's directions for medium heat. Grill steaks, covered, 8 to 11 minutes for medium-rare to medium doneness, turning occasionally.

Cook's Tip: 2 beef shoulder petite tender roasts (about 8 to 12-ounces each) or 4 beef tenderloin steaks, cut 1-inch thick, may be substituted for shoulder center steaks. Grill shoulder petite tender roasts, covered, over medium, ash-covered coals, 14 to 18 minutes (over medium heat on preheated gas grill, covered, 14 to 19 minutes) for medium-rare to medium doneness, turning occasionally. Grill tenderloin steaks, uncovered, over medium, ash-covered coals 13 to 15 minutes (over medium heat on preheated gas grill, covered, 11 to 15 minutes) for medium-rare to medium doneness, turning occasionally.

Cook's Tip: Parmesan shavings may be substituted for Manchego cheese