Although the days are getting longer, the sun just beginning to ride a little higher in the sky, the nights are still bone-chilling. Honestly, I never look forward to winter. But when I'm smack in the middle of it, I do appreciate its comforts—warm clothes, thick blankets, an excuse to use the fireplace, and a big pot of stew. And I mean a big pot. Heck, if you are going to go through all that trouble, you may as well make enough for plenty of meals during the week. This is one such stew, a hearty cousin of beef barley soup, but bulked up with carrots, celery root, and lots of mushrooms.