Beef Barbacoa Tacos

Name: Beef Barbacoa Tacos
Ingredients: 8 dried guajillo chiles, stemmed and seeded; 2 plum tomatoes, quartered; 1 small white onion, quartered; 8 cloves garlic, unpeeled; Kosher salt; 2 pounds beef chuck, cut into 1- to 2-inch pieces; 1/2 teaspoon ground cumin; 1/2 teaspoon ground cinnamon; 1/4 teaspoon cayenne pepper; 1 cup roughly chopped fresh cilantro (leaves and stems); 1/4 teaspoon dried thyme; 2 bay leaves; Freshly ground black pepper; Corn tortillas, warmed, and assorted toppings, for serving