For the dressing: In a large bowl, whisk together the harissa paste, mayonnaise, buttermilk, cilantro, scallions and a few grinds of black pepper.
For the salad: In the same large bowl, add the kale salad mix, chicken, grapes, strawberries and tomatoes. Use 2 serving spoons or tongs to toss and coat everything with the dressing on the bottom. Serve, but this is a salad that actually will hold 3 to 4 days in the refrigerator without the kale wilting!