In a small bowl, combine the first seven ingredients. Set aside 1/4 cup for sauce. Pour remaining marinade into a 2-gallon resealable plastic bag. Add beef; seal bag and turn to coat. Refrigerate for up to 8 hours. Drain and discard marinade.
Preheat oven to 375°. In a large nonstick skillet over medium-high heat, brown beef in oil in batches. Transfer to a greased 15x10x1-in. baking pan. Bake, uncovered, 4-6 minutes or until meat reaches desired doneness (for medium-rare, a thermometer should read 145°; medium, 160°; well-done, 170°).
Meanwhile, in the same skillet, add butter and reserved marinade. Cook and stir over low heat until combined. Serve with steaks. Yield: 6 servings.