Spiced Pork with Plantains

Name: Spiced Pork with Plantains
Ingredients: 1 tablespoon vegetable oil; 4 bone-in pork chops (about 2 lbs. total); 1/2 teaspoon ground cumin; 1/2 teaspoon ground allspice; 1/2 teaspoon cinnamon; 1/2 teaspoon kosher salt; 1/2 teaspoon freshly ground black pepper; 2 very ripe (black-spotted) plantains or firm-ripe bananas, peeled and cut in half lengthwise and again crosswise; 2 tablespoons plus 2 tsp. packed light brown sugar; 1 can (15 oz.) black beans, warmed; 1/4 cup sour cream; 1/2 serrano chile, sliced thinly; 1/2 cup cilantro leaves