Name: Double Stacked Shrimp and Cheese Tacos
Prep time: 20 min
Cook time: 30 min
Ingredients: 2 pounds ripe tomatoes; 4 garlic cloves (peeled); 2 to 3 chiles de árbol (stemmed, keep the seeds (more to taste)); 2 teaspoons oregano; 2 tablespoons tomato paste; 1 teaspoon kosher or sea salt (or to taste, plus more for seasoning the shrimp); 3 tablespoons vegetable oil (divided, plus more to cook the tacos); 2 pounds medium shrimp (rinsed, shelled, and butterflied); Freshly ground pepper (to taste); 2 tablespoons unsalted butter (divided); 12 to 16 corn tortillas; 3 cups melty shredded cheese (such as mozzarella, asadero, Oaxaca, quesadilla, or Monterey Jack); 1 large ripe avocado (halved, pitted, thinly sliced)