Rice with butternut

1 tablespoon olive oil 1 small onion (preferably a sweet variety such as Maui, Wall Walla or Vidalia, cut into small dice, about 1/2 cup) 4 ounces butternut[...]

11 C. chicken stock , divided 1 1/4 C. wild rice 2 T. vegetable oil divided 2 T butter divided 3 ribs celery diced 4 med. sized potatoes , peeled and diced 1[...]