Mandarin Orange Salad

INGREDIENTS

• 1/2 cup sour cream
• 1/4 cup mayonnaise
• 1/4 cup milk
• 3/4 teaspoon minced garlic
• 1/2 teaspoon Worcestershire sauce
• 1 pinch white sugar
• 1 pinch ground white pepper
• 1 pinch ground cayenne pepper
• 2 heads butter lettuce - rinsed, and torn
• 1 small sweet onion, thinly sliced
• 1 (11 ounce) can mandarin oranges, drained
• 5 ounces fresh sliced mushrooms
• salt and pepper to taste