Prepare the marinade: In a bowl, whisk together the yogurt, tomato paste, salt, paprika, and dried herbs until smooth.
Marinate the chicken: Add the chicken pieces to the marinade and coat thoroughly.
Prepare the potatoes: Slice the potatoes and toss them in a baking dish with salt, black pepper, herbs, paprika, and a drizzle of oil. Spread them in an even layer.
Assemble the skewers: Thread the marinated chicken, jalapeño slices, and cherry tomatoes onto wooden skewers.
Bake: Place the skewers over the sliced onions on top of the seasoned potatoes in the baking dish. Bake at 400°F (approx. 200°C) for 45 minutes, or until the chicken is cooked through and the potatoes are tender.
Serve: Enjoy your flavorful skewers on their own or wrapped in warm pita bread.