1 (16 ounce) package corkscrew-shaped pasta (fusilli)
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¾ cup chopped fresh basil
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¾ cup shredded Parmesan cheese
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⅓ cup pine nuts
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⅓ cup extra-virgin olive oil
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1 clove garlic, diced
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½ cup finely diced red onion
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½ cup finely diced radicchio
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1 tablespoon mayonnaise, or to taste
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salt and ground black pepper to taste
Instructions
Bring a large pot of lightly salted water to a boil. Cook fusilli in the boiling water, stirring occasionally, until tender yet firm to the bite, about 12 minutes. Drain.
Combine basil, Parmesan cheese, pine nuts, oil, and garlic in a food processor; blend to make pesto.
Toss pasta with pesto and mix in red onion, radicchio, and mayonnaise. Season with salt and pepper. Refrigerate for at least 30 minutes before serving.