The word "barbacoa" is from Barbadoes culture and loosely translates to mean "barbeque." They were the first recorded people to cook their food on fig branches over an open flame. If available, try cooking the pork in this meal over a barbeque grill, instead of cooking on a hot skillet!
In a bowl, prepare the marinade by mixing together the tomato paste, brown sugar, spice blend and 2 tbsp. (1/4 cup for 4 servings) of water. Season to taste with salt and pepper. Add pork, and toss to coat in marinade. Set aside to marinate for 5 minutes.
While the pork is marinating, prepare the crema. Wash and zest the lime. Add zest to a small bowl, along with the mayonnaise, half of the lime juice and a pinch of salt. Whisk together and set aside.
Heat a large skillet over medium-high heat with a drizzle of oil. Add the marinated pork and cook for 5-10 minutes until golden brown and caramelized.
While the pork is cooking, thinly slice the romaine lettuce , and wash/dry. Drain and rinse the black beans. Thinly slice the green onions. Slice the pitas in half, then carefully open each one into a pocket. Fill the pita with shredded lettuce, carrots, black beans, green onion and barbacoa pork. Top with lime crema and any remaining lime wedges. enjoy!