3Drain the rehydrated Guajillo chiles. In a blender, combine the drained Guajillo chiles, Roma tomatoes, chopped White onion, chopped Garlic cloves, Ground cumin, and Dried Mexican oregano with 100 grams of Chicken broth. Blend until very smooth. Strain the sauce through a fine-mesh sieve into a bowl, pressing on the solids to extract all liquid. Discard the solids.