While the chicken cooks, prepare the rest of the ingredients. Next, measure out 2 tablespoons of the fat and add it back to the pan, reserving the remaining schmaltz for other uses. With the pan still over medium high heat, add the prepared celery, garlic, carrot, bay leaf, onion, parsley, leek tops and oregano, sautéing for 7 – 9 minutes, until the vegetables start to brown. Deglaze the pan with the Brown Ale and use a spatula to scrape the pan, removing any of the fond (cooked brown spots) on the bottom of the pan. Add the chicken thighs back into the pan and add the water, making sure the poultry is fully covered. Once the liquid is boiling, turn the heat to low, cover, and let the chicken poach for about an hour.