This pesto gets its richness from half-and-half. The result is a creamy mixture similar to an Alfredo sauce but with pestolike flavor. Serve it with a tossed garden salad and a French bread baguette.
Cook pasta according to package directions, omitting salt and fat.
While pasta cooks, place basil and remaining ingredients in a food processor; process until smooth. Combine basil mixture and pasta in a large bowl, tossing to coat.
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