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Soak raisins in warm water for 15 minutes.
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Warm oil in pan and toss pine nuts or almonds in it until golden.
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Mix in tomatoes, season with salt, simmer for 10 minutes.
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Add drained raisins, sugar and vinegar and cook gently for 2 minutes. Taste and adjust balance of sweet, sour and salt.
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Cook and drain pasta, mix with sauce.
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Blend in apple just before serving cold, but not chilled.