Instructions: In a blender blend the peanut butter, the soy sauce, the lemon juice, the garlic, the red hot pepper flakes, the sugar, and 1/4 cup hot water until the sauce is smooth. In a kettle of boiling salted water boil the spaghetti until it is just tender, drain it in a colander, and rinse it briefly under cold water. Drain the spaghetti well, transfer it to a bowl, and toss it with the sauce, the cucumber, the scallion, and salt and pepper to taste. Serve the pasta at room temperature.

Serves 2.

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