Roasted Tomato-Chile de Árbol Salsa

• 4 ripe plum tomatoes (about 1 pound)
• 2 medium unpeeled garlic cloves
• 1

Preheat the broiler. Position a broiler rack 8 inches from the heat. Broil the tomatoes, garlic, onion, and serrano and árbol chiles until blackened all over. Leave the blackened skin on the vegetables. Transfer all ingredients to the jar of an electric blender and pulse until coarsely ch