Upgrade boneless turkey thighs by tossing them in a combination of grainy mustard, malt vinegar, and extra-virgin olive oil. Mild malt vinegar tenderizes these kebabs and flavors the crunchy slaw.
In a large bowl, whisk together mustard, vinegar, oil, and sugar; season mustard sauce with salt and pepper. Transfer 1/2 cup to another large bowl, add turkey, and toss to combine. Cover and refrigerate 30 minutes.
To remaining mustard sauce, add cabbage, carrots, and onion. Toss to combine and season slaw with salt and pepper.
Thread 3 to 4 pieces turkey onto each of fourteen 6-inch skewers. Heat a grill pan or cast-iron skillet over medium-high; lightly oil pan. In batches, grill kebabs until cooked through, 10 to 12 minutes, turning halfway through. Reserve 6 kebabs and 2 cups slaw for Turkey Wraps. Serve remaining kebabs with slaw.
If you don't have a grill pan or cast-iron skillet, you can use a heavy-bottomed pan.