For the salsa roja: Tear all the chiles into large pieces. Toast them in a large dry skillet over medium heat until they change color a bit, about 2 minutes. Add the spices and toast for 2 to 3 ...

3 medium plum tomatoes (about 8 ounces), cored. 1 serrano chili, halved lengthwise and seeded. 2 medium garlic cloves, smashed and peeled. ¼ medium white onion, peeled, layers separated ...