Andouille Sausage and Potato Casserole with Swiss Cheese

In a large skillet set over medium heat, brown the sausage well. Drain off the fat. In a large bowl, combine the eggs and half-and-half; beat well. Add the mascarpone and blend well. Add the remaining ingredients and combine well. Pour the mixture into a lightly buttered baking dish. Bake in a 350-degree oven for 1 and ¼ hours. Let sit for 15 minutes. Cut into squares and serve immediately