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Whisk oil and vinegar, season with salt and pepper. |
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Wash and chop herbs and add to mixture with Rougette. |
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Cover and leave to marinate for 1 hour. |
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Peel potatoes, and slice thinly. |
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Add potatoes, onion, and peppers into a bowl and add marinade. Leave to stand for at least 15 minutes. |
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