Heat the oil in the base of your crockpot (or any other pan if your crockpot doesn’t have this function.) Saute the onion, carrots, celery, jalapeño, garlic, 1tsp salt, and 1tsp pepper for 3-5 minutes until the onions become clear and fragrant. Add the mushrooms, and saute for another 2-3 minutes. Then, add the arrowroot or cornstarch - do not skip this step; it’s what thickens the liquid! Let it cook with the veggies and stir occasionally for a minute or so until it dissolves, then add the chicken, wild rice, coconut milk, broth, lime juice, and remaining salt and pepper. Give everything a big stir.