Stroganoff Soup

Ingredients

• 1/2 pound beef top sirloin steak or beef tenderloin, cut into thin strips
• 1/2 cup chopped onion
• 1 tablespoon butter
• 2 cups water
• 1-1/2 cups milk
• 1/4 cup tomato paste
• 2 teaspoons beef bouillon granules
• 1 can (8 ounces) mushroom stems and pieces, drained
• 1 teaspoon salt
• 1/8 teaspoon pepper
• 1 can (12 ounces) evaporated milk
• 1/3 cup all-purpose flour
• 2 cups cooked wide egg noodles
• 1/2 cup sour cream