Pierce sirloin thoroughly with fork. Place on microwave pan. Set aside. In small bowl, combine Worcestershire sauce with onion and garlic powders. Mix well. Brush on all surfaces of sirloin. Sprinkle top of sirloin with pepper. Microwave at 70% (medium-high) for 6-11 minutes, or until medium rare, rotating once. Cool slightly. Cut into ½-inch cubes. Place in large mixing bowl. Set aside. In 1-qt. casserole combine pea pods and water. Cover. Microwave on high 1-2 minutes, or until pods are very hot and color brightens. Rinse with cold water and drain. Set aside. To assemble salad, layer spinach leaves over beef. Continue layering tomato halves, mushrooms, onions, and pea pods. Set aside. In a 2 cup measure, combine sour cream, mayonnaise, vinegar, and salt. Mix well. Stir in bleu cheese. Pour over salad, spread evenly. Sprinkle with parsley. Cover and chill at least 3 hours. Toss salad before serving.
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