Cook pasta according to package directions, omitting salt and fat.
While pasta cooks, place walnuts in a single layer on a baking sheet.
Bake at 350 for 8 minutes or until toasted.
Place 1/3 cup hot walnuts, salt, and garlic in a food processor; process until nuts are finely ground. Microwave milk at HIGH 1 minute or until hot.
Add hot milk to food processor; process until smooth. Chop remaining walnuts.
Drain pasta, reserving 1/4 cup pasta water.
Combine pasta, walnut cream, chopped walnuts, and pepper in a bowl; toss to coat. If necessary, add reserved pasta water, 1 tablespoon at a time, to thin walnut cream.
Sprinkle with Romano cheese.
Serve immediately.
Crema di noci (KREH-mah dee NOH-chee) means "cream of walnut." Toasted walnuts are pured into butter as a base for this pasta sauce.