Add about 3 Tbsp. of the spaghetti boiling water to the oil in the pan, stir in the cooked spaghetti and season to taste with salt and pepper. Serve.
Note: Adding the spaghetti boiling water at stage 4 provides a mellow saltiness, increasing the flavor and improving the texture of the pasta. It is a good idea to add some cooking liquid to pasta dishes which do not have much sauce, as this prevents the dish from being too dry.
Recipe and photo courtesy of the Umami Information Center.
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