Stir in the ground walnuts and Parmesan cheese. Heat through, being careful that the cream doesn't boil. When the ravioli are done, drain off the water and pour them into a serving bowl. Pour the sauce over the ravioli and sprinkle on the parsley. Spread the hot sage-flavored cheese on unsalted tortilla chips.
Mango chutney makes a nice accompaniment.
Cut the wheel of cheese into 12 wedges. Break the egg into a shallow bowl. Beat until blended. Combine the cornmeal and sage in a shallow pie plate. Heat the oil in a large frying pan.