Preheat the oven to 475°. In a large skillet, heat 1/2 tablespoon of the vegetable oil. Add the smoked ham and cook over moderately high heat until browned on the bottom, about 2 minutes. Using a slotted spoon, transfer the ham to a plate. Add 1 1/2 tablespoons of the vegetable oil to the skillet along with the garlic, onions, Scotch bonnet chiles and green bell pepper. Cover and cook over moderately low heat, stirring occasionally, until the vegetables are softened, about 12 minutes. Stir in the paprika and cook over moderately high heat for 1 minute. Add the tomatoes and cook until they release their juices, about 2 minutes. Stir in the ham and season the sofrito with salt and pepper.