Cut 1 zucchini into cubes for the sauce and set them aside.
Meanwhile, bring water to a boil. Just before you add water to the tabbouleh, mix it with your hands in a little olive oil so that the grains do not stick.
Pour the hot water and lemon juice over the dry tabbouleh and cover it with a towel. Let it sit until it is cooked, or until the liquid is completely absorbed.
Cut the zucchini into large pieces for grilling. Rub them with oil and salt before grilling. Grill them on both sides; they should be cooked but crispy.
Cut the sun-dried tomatoes into small cubes and set them aside.
Throw the zucchini into a blender, with half of the arugula, blend on low speed with a little olive oil, and then increase the speed until you get a creamy and smooth sauce.
Finely chop the shallots and soak them in water to soften the strong flavor. Also finely chop the chives.
Mix the tabbouleh with the sun-dried tomatoes and chives. Add a little zucchini sauce and season to taste.
Serve on a nice plate, add the zucchini with a little paprika and place the shallots on a handful of arugula, finishing with a little sauce on top.