Stir-Fried Beef and Potatoes Trim fat off beef before cooking. 1 1/2 pounds sirloin steak 2 teaspoons vegetable oil 1 clove garlic, minced 1 teaspoon vinegar 1/8 teaspoon salt 1/8 teaspoon pepper 2 large onions, sliced 1 large tomato, sliced 3 cups boiled potatoes, diced 1. Trim fat from steak and cut into small, thin pieces. 2. In a large skillet, heat oil and saute garlic until garlic is golden. Add steak, vinegar, salt, and pepper. 3. Cook for 6 minutes, stirring beef until brown. 4. Add onion and tomato. Cook until onion is transparent. Serve with boiled potatoes and white rice Yield: 6 servings--Serving size: 1 1/4 cup Each serving with potatoes and rice provides: Calories: 549