In large bowl, place couscous and 3/4 cup boiled water, cover with plate, and let stand for approximately 5 minutes. Fluff cooked couscous with fork.
Meanwhile, prepare salad dressing by adding to bowl all dressing ingredients and whisking to combine. Set aside.
In each of 2 large bowls, add 1 1/2 cups spinach. Top with half the couscous. Now have fun arranging remaining vegetable and fruit ingredients in each bowl to showcase your beautiful rainbow. Top each with tuna, then drizzle with dressing.
Recipe Notes
Per serving: 351 calories; 25 g protein; 4 g total fat (0 g sat. fat); 60 g total carbohydrates (16 g sugar, 10 g fiber); 349 mg sodium