This recipe is from Chow.com - discovered it a month or two ago. I've made a single batch and a double batch, both times it was completely gone within 24 hours. I'm sure letting it sit would make it taste even better, but who wants to wait?
Papalote Salsa on Chow.com
* 5 medium roma tomatoes, cored and halved
* 10 dried chiles de arbol, stemmed, halved, and seeded
* 2 teaspoons ground dried pasilla peppers
* 1 tablespoon kosher salt
* 1 teaspoon sugar
* 1 1/2 cups water
* 2 tablespoons unsalted hulled pumpkin seeds
* 3 tablespoons white vinegar
* 1/4 cup minced scallions
* 1/4 cup coarsely chopped cilantro
1. Heat the broiler. Line a baking sheet with aluminum foil, then place tomatoes skin side up on the baking sheet. When the broiler is hot, char tomatoes until skins are slightly burned. Turn off the broiler.
2. Remove tomatoes from the oven and place them in a stainless steel pot. Add chiles de arbol, pasilla peppers, salt, sugar, and water. Bring to a boil, then reduce to a simmer. Cook for 20 minutes, stirring often.
3. While tomato mixture is cooking, heat oven to 350°F and toast pumpkin seeds on a rimmed baking sheet until just browned. Remove seeds from the tray and cool.
4. After the 20 minutes, add vinegar to tomato mixture and cook for 1 minute. Add toasted pumpkin seeds. Place mixture in a blender, and blend until smooth.
5. Pour salsa into a container and stir in scallions and cilantro. Refrigerate for several hours before serving.