Heat the oil in a large pot over medium-high heat. Add the marinade and brown in the oil while stirring. Add the pork and cook for 1 minute, stirring to coat the meat in the marinade. Add the broth, orange juice, lime juice, garlic and chili pepper. Bring to a boil. Make a bouquet garni with the leek, parsley and thyme. Add to the broth. Season generously with salt and pepper.