3 tbsp. olive oil
1/4 tsp. black pepper
1/4 tsp. cinnamon
1/2 tsp. ground cumin
1/2 tsp. kosher salt
1 tsp. oregano (See Note 3)
2 tbsp. brown sugar (See Note 2)
3 cloves garlic
1/4 cup cider vinegar
2 Roma tomatoes, chopped (8 oz with juices)
1/2 cup chile powder (See Note 1)
2 cups dried chipotle peppers (to soak in adobo sauce) (or 20 freshly smoked, not dried)