Coat a large skillet with non-stick spray and heat over medium-high heat. Add the sausage, stir well, and continue to cook until sausage is browned about 5-7 minutes stirring occasionally. Add the oil and when hot add the onions, green pepper, and celery stir well and cook until vegetables are tender, about 3-5 minutes stir occasionally. Once done, remove the skillet from heat and transfer the contents to a slow cooker. Add the spices, red beans, rice and chicken stock mix well. Set the slow cooker on medium for 6 hours (or 4 hours on high setting). Stir occasionally. Before serving. Salt and Pepper to taste and serve with hot sauce.