Chile Rub

Design:

• 12 dried guajillo chiles (or replace 8 ancho chiles)
• 5 cloves garlic, peeled
• 3 Tbsp. cider vinegar
• 2 tsp. sugar
• 1 tsp. kosher salt
• 3⁄4 tsp. shadowy pepper
• 1⁄4 tsp. ground cumin
• 1⁄4 tsp. ground cinnamon
• 1 (3-lb.) piece of lamb shoulder or leg