1. Bring the water or broth to boil. Add the couscous and sea salt, and stir it thoroughly. Remove the pot from heat, cover it, and allow it to sit for 5-10 minutes. Fluff couscous with a fork and set it aside.
2. While you wait for the water to boil (or the couscous to sit), heat the olive oil and garlic in a large skillet. Add the asparagus and zucchini and sautee them until they're bright green and very tender (7-10 minutes). Season them to taste with salt and pepper.
3. In a large mixing bowl, combine the cooked couscous, the lemon juice, the tomatoes, the cooked vegetables, the pine nuts, and the chives. Season it all to taste with salt and pepper, and serve.