In a medium bowl, toss together sweet peppers, red onion, hoisin sauce, red wine, and olive oil. Thread vegetables onto four 10-inch-long skewers;* set aside.

Trim fat from steaks. Sprinkle both sides of each steak with salt and pepper; rub in with your fingers. For a charcoal grill, place steaks and skewers on the rack of an uncovered grill directly over medium coals. Grill steak until desired doneness. Allow 10 to 12 minutes for medium-rare doneness (145 degrees F ) or 12 to 15 minutes for medium doneness (160 degrees F ). Grill skewers about 12 minutes or until vegetables are crisp-tender and lightly charred, turning once halfway through grilling. (For a gas grill, preheat grill. Reduce heat to medium. Place steaks and skewers on grill rack over heat. Cover and grill as above.)

*Test Kitchen Tip: If using wooden skewers, soak them in water for at least 30 minutes before using. Instead of using skewers, you can place the vegetables in a grill wok; place the grill wok on the grill rack and grill for 12 minutes, stirring once halfway through grilling time.