Cauliflower Tinga Tacos

Name: Cauliflower Tinga Tacos
Ingredients: 1 medium cauliflower (about 2 pounds), cored and cut into medium to large florets; 3 tablespoons extra-virgin olive oil, divided; Kosher salt; Freshly ground black pepper; 1 small yellow onion, roughly chopped; 4 garlic cloves, roughly chopped; 1 teaspoon ancho chile powder; 1 teaspoon ground cumin; 1/2 teaspoon ground coriander; 1/2 teaspoon dried oregano, preferably Mexican; 1/4 teaspoon allspice; One 28-ounce can whole peeled tomatoes; 8 corn tortillas; Diced white onion, for serving; Cilantro leaves, for serving; Cotija cheese, for serving (optional)