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1 small red bell pepper
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1/2 cup mayonnaise
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2 oil-packed anchovy fillets, drained and chopped
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2 teaspoons Dijon mustard
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2 teaspoons fresh lemon juice
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2 garlic cloves, chopped
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Pinch of saffron threads
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2 tablespoons extra-virgin olive oil
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Salt and freshly ground pepper
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Tabasco
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Roast the bell pepper over a gas flame or under a preheated broiler, turning occasionally, until charred all over. Transfer to a plate to cool. Discard the skin, stem and seeds. Coarsely chop the pepper and transfer to a blender. Add the mayonnaise, anchovies, mustard, lemon juice, garlic and saffron and puree. With the machine on, add the oil. Season with salt, pepper and Tabasco; serve.
Make Ahead
The rouille can be covered and refrigerated overnight. Bring to room temperature before serving.