Stack beef steaks; cut lengthwise in half, then crosswise into 1-inch wide strips. Combine 2 tablespoons dressing, garlic and beef in medium bowl. Cover and marinate in refrigerator 30 minutes to 2 hours.
Heat large nonstick skillet over medium-high heat until hot. Add 1/2 of beef; stir-fry 1 to 3 minutes or until outside surface of beef is no longer pink. (Do not overcook.) Remove from skillet. Repeat with remaining beef.
Using slotted spoon, add beef to salad greens. Add remaining 6 tablespoons dressing; toss to coat. Sprinkle with peanuts.
Nutrition information per serving: 280 Calories; 126 kcal Calories from fat; 14 g Total Fat; 3 g Saturated Fat; 3 g Monounsaturated Fat; 75 mg Cholesterol; 347 mg Sodium; 12 g Total Carbohydrate; 2.8 g Dietary Fiber; 27 g Protein; 3.5 mg Iron; 5.3 mg Niacin; 0.4 mg Vitamin B6; 1.3 mcg Vitamin B12; 4.6 mg Zinc; 27 mcg Selenium;