6 tablespoons extra virgin olive oil
6 tablespoons butter
2 pounds fresh mushrooms, sliced thin
1 pound Prosciutto, cut in bits
4 large ripe tomatoes, peeled, seeded, and chopped into.5-inch cubes (or.5 cup tomato puree
2 cups of baby peas
1/2 teaspoon ground nutmeg
4 fresh sage leaves, chopped fine (or 1 teaspoon dried sage leaves, rubbed)
2 cups heavy cream
2 pounds fettuccine
Salt +
Freshly ground black pepper +
2 cups freshly grated Parmesan cheese
1 cup finely chopped flat parsley
1 1/3 cup walnuts, toasted (optional)