Prepare the Chiles
Remove the stems and seeds from the guajillo and chile de árbol peppers.
Toast the chiles in a dry skillet over medium heat for about 30 seconds, until fragrant.
Make the Sauce
In the same skillet, sauté the onion, garlic, and tomatoes until softened.
Add the toasted chiles and 1 cup of water. Simmer for 5–7 minutes to rehydrate the chiles.
Transfer the mixture to a blender and blend until smooth. Strain the sauce through a fine mesh strainer for a silky texture.
Cook the Shrimp
Heat olive oil in a large skillet over medium-high heat. Add the shrimp and cook for 1–2 minutes per side, until pink and slightly curled. Remove and set aside.
Combine and Simmer
Pour the sauce into the skillet and simmer for 5 minutes to enhance the flavors.
Return the shrimp to the skillet, toss to coat in the sauce, and cook for an additional 3–4 minutes.
Serve and Garnish
Serve immediately with fresh cilantro and lime wedges on the side. Enjoy with Mexican rice, beans, or warm tortillas.