14 oz / 400 g spaghetti 2 cups packed fresh arugula 1 / 3 cup toasted walnuts (30 g) 1 garlic clove 1 / 2 cup grated Parmigiano-Reggiano (50 g) 7 tbsp (100 ml) extra-virgin olive oil Juice of 1 / 2 lemon Salt to taste Freshly ground black pepper to taste Reserved pasta cooking water as needed
1. In a food processor, pulse arugula, toasted walnuts, garlic, and Parmigiano-Reggiano; with the motor running, stream in olive oil and lemon juice until a coarse, spreadable pesto forms. Season to taste. 2. Cook the spaghetti in salted water until al dente; reserve 1 cup pasta water and drain. 3. Combine hot spaghetti with the arugula-walnut pesto, tossing and adding reserved pasta water a little at a time to achieve a silky coating. 4. Adjust seasoning, finish with a drizzle of olive oil and extra cracked pepper, and serve.
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