Heat oven to 400°F. Spray 11 x 7-inch glass baking dish with nonstick cooking spray. Remove beef tips with gravy from package and place in prepared baking dish. Add sour cream, soy sauce, garlic and thyme; mix well. Stir in noodles, frozen vegetables and mushrooms. Cover with aluminum foil.
Bake in 400°F oven 35 minutes or until heated through. Top with french-fried onions. Bake, uncovered, 3 to 5 minutes or until onions are lightly browned.
Nutrition information per serving: 514 Calories; 180 kcal Calories from fat; 20 g Total Fat; 7 g Saturated Fat; 3 g Monounsaturated Fat; 106 mg Cholesterol; 1043 mg Sodium; 55 g Total Carbohydrate; 4.7 g Dietary Fiber; 28 g Protein; 4.4 mg Iron; 7.6 mg NE Niacin; 0.4 mg Vitamin B6; 3.9 mcg Vitamin B12; 5.1 mg Zinc; 46.1 mcg Selenium;