Pulled Pork Enchiladas

Name: Pulled Pork Enchiladas
Ingredients: 4 large plum tomatoes (about 1.4lb/ 650 g ), quartered; 1 medium white onion , cut into chunks; 3 cloves garlic; 3 tablespoons olive oil; 2 to 4 dried chiles de árbol, stemmed and deseeded; 1/4 cup water; 1 teaspoon kosher salt , plus more to taste; 1 teaspoon freshly ground black pepper; 1 teaspoon ground cumin; 4 cups ( 640 g ) carnitas or pulled pork; 1/2 cup vegetable oil , divided, as needed; 12 corn tortillas; 2 cups ( 8 ounces ) grated Monterey Jack, cheddar , or Chihuahua cheese; 1 cup sour cream , for serving; 1 small red onion , finely diced, for serving; 1 cup fresh cilantro, chopped , for serving