Grapefruit, Avocado, and Watercress Salad with Tarragon-Yogurt Dressing - Delicious Living

Ingredients

• 6 tablespoons low-fat plain yogurt
• 2 tablespoons mayonnaise
• 1/4 teaspoon salt
• 1/2 teaspoon finely grated onion
• 2 tablespoons chopped fresh tarragon (or 2 teaspoons dried)
• 1/2 teaspoon fresh lemon juice
• Freshly ground black pepper
• 1 large pink grapefruit
• 1 bunch (1/2 pound) flat-leaf watercress (washed, trimmed, and spun dry)
• 1 avocado (cut into wedges)