Season both sides of each steak with salt and pepper, to taste. Combine the olive oil, wine, lemon zest, garlic, and rosemary in a bowl or sealable plastic bag and mix thoroughly. Add the steaks to the mixture and marinate for 2-3 hours total, turning occasionally (or if using a plastic bag, flip the bag).
Remove from the refrigerator 30 minutes prior to cooking. Drain the marinade from the meat. Brush the grill with olive oil and preheat the grill on medium heat. Grill each steak for 3-4 minutes per side or until the desired doneness is achieved (a meat thermometer inserted into the center of the steak should read 145 degrees for medium).