Marinated Navy Beans and Zucchini

Ingredients

• plain low-fat yogurt or soy yogurt
  ½ cup
• mayonnaise or soy mayonnaise
  ¼ cup
• snipped fresh dill
  ¼ cup
• chopped fresh parsley
  ¼ cup
• tbs. chopped fresh tarragon (optional)
  1 unit
• fresh lemon juice or more to taste
  2 tbsp
• (15-oz) cans navy or other white beans

  rinsed and drained
  2 unit
• dill pickles

  quartered lengthwise and thinly sliced (1 cup)
  1 to 2 unit
• zucchini

  halved lengthwise and thinly sliced
  1 medium
• red bell pepper

  finely diced
  1 small
• scallion

  thinly sliced
  1 unit
• dark green lettuce leaves for serving (optional)
  1 unit