extra-virgin olive oil • garlic, minced • leak, white and pale green parts only, thinly sliced and rinsed well • tart green apple (granny smith) cored, peeled, and cut into 1-inch chunks • celery stalk, thinly sliced • finely grated fresh ginger • sweet potatoes, peeled and cut into 1-inch cubes • chicken stock • chipotle chile in adobo sauce • salted pepitas (green hulled pumpkin seeds; whole foods) • course salt • ground pepper