12 oz. Pappardelle's Rainbow Cheese Tortelloni
8 celery stalks, cut in 3" pieces
6 carrots, cut in 3" pieces
8 garlic cloves, smashed
3 onions, cut in 3" pieces
8 bay leaves
1 lb. parmesan rinds, found at specialty grocers or cheese shops
4-5 dried porcini mushrooms, optional
1 bunch fresh thyme
1 bunch fresh parsley
2 tablespoons black peppercorns
6 qt water
Salt and pepper