In a large pot, prepare the pasta according to the package directions. Drain and return to the pot.
12-16 ounces spaghetti
Meanwhile, in a high-speed blender, combine the cashews, water, lemon juice, and salt. Blend until very smooth.
1 cup raw cashews*, 1 cup water, 3 Tablespoons lemon juice**, salt
Pour the sauce from the blender over the cooked pasta in the pot. Toss well so every strand is coated.
Divide among four bowls. Garnish each serving with lemon zest and parsley, if using, and enjoy immediately.
1 Tablespoon lemon zest, fresh parsley
Notes
*If you don't have a high-speed blender, soak the raw cashews in a bowl of hot water for 30 minutes to soften before blending.**Be sure to zest the lemon before squeezing out the juice.Leftovers can be refrigerated in an airtight container for up to two days.