2 large guajillo or other medium-hot dried chiles, toasted, soaked, and cleaned
1/4cup good-quality vegetable oil
2 large onions, chopped
4 cloves garlic, minced
2pounds tomatoes, peeled, seeded, and chopped, with their liquid (about 3 cups; canned are fine)
12ounces beer
1 tablespoon sugar
Salt and pepper
1/4cup chopped fresh cilantro
3 tablespoons fresh lime juice
2 tablespoons tequila
Instructions
Mince the chiles. Put the oil in a medium saucepan or deep skillet with a lid over medium-high heat. When it’s hot, add the chiles, onions, and garlic and cook, stirring occasionally, until the onions soften, about 5 minutes. Add the tomatoes, beer, sugar, some salt, and plenty of pepper.
Adjust the heat so the mixture bubbles gently and cook, stirring occasionally, until it thickens and comes together, about 30 minutes. Use an immersion blender to purée the sauce in the pan. Or cool the mixture slightly, pour it into a blender or food processor, and purée carefully, scraping down the side as necessary.
Stir in the cilantro, lime juice and tequila. Taste and adjust the seasoning. Serve hot or at room temperature, or cover and refrigerate for up to 2 days.