Red Mole with Potatoes and Nopales Papasmole

Name: Red Mole with Potatoes and Nopales (Papasmole)
Ingredients: 4 medium dried ancho chiles; 1 large dried guajillo chile; ⅓ cup sesame seeds; ¼ lb. cleaned nopales, cut in ½-inch pieces (1 cup); Kosher salt; 3 large garlic cloves, divided; 1 Tbsp. white wine vinegar; 2¼ lb. Yukon gold potatoes, peeled and cut into ½-inch pieces (6½ cups); 5 medium tomatoes on the vine (1 lb. 14 oz.); 3 whole peppercorns; ½ tsp. ground cinnamon; ¼ tsp. ground cumin; 1 Tbsp. canola oil; 1 cup coarsely chopped white onion; Corn tortillas, for serving