Julienne the zucchini, place in a colander, sprinkle with the salt and drain for 1/2 hour. Then, rinse , and squeeze and towel out the excess moisture. A salad spinner can work.
In a blender, put the olive oil, lemon juice, tarragon leaves and cream.
Blend until creamy and all the ingredients are fully incorporated into a creamy dressing.
Toss the zucchini with the sauce (amount determined by taste).
Sprinkle with the chopped chives. Grind pepper over mixture to taste.