Mix the soup, garlic, lemon juice, oil, brown sugar, thyme and Worcestershire sauce together in a saucepan. Brush one side of the steak with the mixture. Place sauce side down on heated grill. Brush top with more sauce. Grill for 2 minutes. Brush with more sauce. Grill 2 more minutes or to your preference. Heat remaing sauce to boiling and serve with steak. Makes 6 servings.