Good-Cooking - Tangy Beef Strips

Ingredients

• 1 (1 pound) boneless sirloin steak
• 2 tablespoons vegetable oil
• 1 cup sliced onions
• 2 cloves garlic, minced
• 1 cup chili sauce
• 1/2 cup water
• 1 teaspoon beef bouillon granules
• 1/4 teaspoon ground cumin
• 1/4 teaspoon pepper
• 2 cups quartered fresh mushrooms
• 1/2 medium green bell pepper, cut into strips
• 1/2 medium red bell pepper, cut into strips
• 2 tablespoons plain yogurt
• 1/2 teaspoon cornstarch
• Hot cooked noodles