"The aioli will appear quite tight when all the oil is incorporated, but it will loosen to a pourable consistency once the buttermilk and shallot are added...."
INGREDIENTS
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1 small shallot, finely chopped
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2 tablespoons fresh lemon juice
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1 large egg yolk
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1 garlic clove, finely grated
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1/4 teaspoon kosher salt, plus more
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Pinch of cayenne pepper
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1/2 cup vegetable oil
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2 tablespoons buttermilk
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2 tablespoons crème fraîche
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Freshly ground black pepper
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1 1/2 pound sugar snap peas, untrimmed, divided
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2 tablespoons olive oil, divided
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1 tablespoon thinly sliced drained oil-packed Calabrian chiles
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Flaky sea salt (such as Maldon)