Preheat oven to 350°. Place garbanzo beans on a parchment-lined rimmed baking sheet. Drizzle with oil and sprinkle with 1/2 teaspoon salt and 1/4 teaspoon pepper; toss to coat. Bake until golden brown, about 20 minutes., Meanwhile, cook pasta according to package directions for al dente. Drain pasta; rinse with cold water and drain well. Place kale in a large mixing bowl; massage until tender, 3-5 minutes. Add pasta. , Finely grate zest from 1 lemon. Cut lemons crosswise in half; squeeze juice from lemons. In a small bowl, whisk water, tahini, garlic, olive juice, lemon juice and zest, and remaining 1/4 teaspoon salt and 1/4 teaspoon pepper. Pour over pasta mixture; toss to coat. Stir in garbanzo beans, tomatoes and olives. Refrigerate, covered, at least 3 hours.