Start by putting the potatoes, carrots and celery into the crock pot. Cook the onions in 1 Tbsp of olive oil until they are almost caramelized. Add the garlic and deglaze with 1/2 cup of the red wine. Add thisnto the crockpot after about 1 minute.
Cut the meat into large chunks so it would fit easily into the crock pot. If you make this recipe in a Dutch Oven or Casserole, you can leave the roast whole.
Add 1 more tablespoon of oil to the pan and sear the meat until it's brown on both sides. Deglaze the pan with the rest of the red wine and scrape up all the meat bits. Add to crock pot.
Add the final tablespoon of oil to pan and saute the mushrooms. Deglaze with ½ cup of chicken stock. Allow it to reduce for a minute. Add the mushrooms to the crockpot add the remaining 1/2 cup chicken stock and the dried herbs and cook all day on low.
After at least 6 hours of cook time, taste for seasoning. Check the liquid. Is it too thin? You can turn it up to high and leave the lid off to reduce some of the liquid if necessary.
Notes
While there are already potatoes in this dish for starch, it would be excellent served with a soft polenta or mashed potatoes and a green salad.