Ziti with Sausage Lemon and Sage

INGREDIENTS

1 cup

walnut halves

1 lb

sweet or hot Italian sausage

3/4 lb

ziti, or other similar pasta

2 tbsp

butter

bunch fresh sage

1/4 cup

cream

juice of 1 large lemon (about 3 tbsp)

3/4 cup

grated Asiago cheese (or other hard Italian cheese)

lots (at least 1/3 cup) chopped fresh parsley