A touch of adobo sauce in this blueberry vinaigrette adds a nice smoky flavor.
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In a small saucepan, mash the blueberries with the sugar and lemon juice and bring to a simmer over moderate heat. Cook, stirring, until thickened, about 8 minutes. Let the mixture cool slightly.
Scrape the blueberry mixture into a bowl and whisk in the oil, vinegar and adobo sauce. Season with salt and pepper.