Chicken with Pumpkin Seed Sauce (Chicken Pepián)

Bahan-bahan (6 porsi)

• wooden or metal skewers
• 2 pounds boneless skinless chicken breasts, cut into bite-sized pieces
• 2 tablespoons olive oil
• Kosh salt and freshly-cracked black pepper
• optional toppings: chopped fresh cilantro, thinly-sliced green onions, chopped pepitas, etc.
• 1 pound fresh tomatillos, rinsed and halved (with the papery husks and stems removed and discarded)
• 1 poblano pepper, cored and sliced in half lengthwise
• 2 tablespoons olive oil, divided
• 2/3 cup raw pepitas (green pumpkin seeds), plus extras for garnish
• 1 small white onion, peeled and diced
• 5 g arlic cloves, peeled and minced
• 1 jalapeno, stemmed, seeded and chopped
• 1 cup fresh cilantro leaves, lightly packed
• 1/2 cup vegetable stock or water
• 2 tablespoons fresh lime juice
• 1/2 teaspoon cumin
• Kosher salt and freshly-cracked black pepper