1 small dried red chile, stemmed and most seeds
discarded
3 cloves garlic, chopped
1 tablespoon light brown sugar
1 tablespoon vegetable oil
2 teaspoons ground cumin
2 teaspoons kosher salt
1 teaspoon freshly ground black pepper
1 tablespoon cider vinegar
Directions
Combine vegetable stock, ancho chiles, plum tomatoes, onion, red chile, garlic, brown sugar, vegetable oil, cumin, kosher salt, and black pepper in a saucepan; bring to a boil. Boil mixture for 2 minutes.
Cover saucepan and remove from heat; let stand for 10 minutes.
Pour mixture into a blender no more than half full. Cover and hold lid down; pulse a few times before leaving on to blend. Puree in batches until smooth. Transfer salsa to a bowl and stir in vinegar.