Ingredients
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1/4 cup vegetable oil
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3 large jalapeños, seeded and quartered lengthwise
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1 large serrano chile with seeds, quartered lengthwise
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1/2 small white onion, thinly sliced
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1 large garlic clove, thinly sliced
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1 cup water
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1/2 Hass avocado
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2 1/2 to 3 tablespoons fresh lime juice
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Salt and freshly ground pepper
Directions
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In a medium saucepan, heat 1 tablespoon of the oil. Add the jalapeños, serrano, onion and garlic and cook over moderate heat, stirring occasionally, until slightly softened, about 5 minutes. Add the water and bring to a boil. Cook over moderate heat until the vegetables are tender and the water is reduced by half, about 5 minutes. Transfer the mixture to a blender and puree until smooth. Add the avocado and puree until smooth. With the machine on, add the remaining 3 tablespoons of oil and puree until creamy. Add the lime juice and season with salt and pepper.
Make Ahead
The sauce can be refrigerated for up to 3 days.