Preheat the oven to 400 degrees F.
On a sheet pan, toss the potatoes with 1 tablespoon olive oil, 1/2 teaspoon kosher salt and 1/4 teaspoon black pepper. Arrange them in a single later, cut side down.
Roast the potatoes until they are golden brown and the skin has wrinkled, about 40-45 minutes.
Combine the potatoes, kale, onions, chives, parsley and sesame seeds in a large bowl.
For the dressing, whisk together the tahini, mustard, lemon juice, olive oil, 1/4 teaspoon kosher salt and 1/4 teaspoon black pepper in a small bowl.
Drizzle the dressing into the salad, tossing to combine.