Step 1

In a large saucepan, bring water to a boil. Add zucchini; cover and boil for 2-3 minutes. Drain and immediately place zucchini in ice water. Drain and pat dry. Transfer to a large serving bowl; sprinkle with salt. Add the tomatoes and onion.

Step 2

In a jar with a tight-fitting lid, combine the oil, vinegar, tarragon, mustard, salt, hot pepper sauce and garlic; shake well. Pour over vegetables and gently toss to coat. Sprinkle with parsley. Refrigerate until serving.