1.In A Large Skillet, Cook Onion In Butter Over Medium Heat For 15-20 Minutes Or Until Onion Is Golden Brown, Stirring Frequently. Stir In Wine Or Broth And Garlic. Bring To A Boil. Reduce Heat; Simmer, Uncovered, For 3-4 Minutes Or Until Liquid Has Evaporated. 2.Meanwhile, Combine The Rosemary, Salt And Pepper; Rub Over Steaks. Broil 4 In. From The Heat For 7-9 Minutes On Each Side Or Until Meat Reaches Desired Doneness (For Medium-Rare, A Meat Thermometer Should Read 145 Degrees F; Medium, 160 Degrees F; Well-Done, 170 Degrees F). Serve With Caramelized Onions.