Butternut Squash Queso Dip

Olive oil1 c. diced red onion1 ½ T. flour¼ c. chicken stock1 (10-oz.) pkgs. fresh or frozen butternut squash, pureed (if frozen, thaw)1 T. minced chipotle chile in adobo sauce, plus 2 t. adobo sauce1 c. shredded Oaxaca or mozzarella…