1. Prepare grill (do not spread charcoal out to edges of grill).
2. Make mojo: Puree mango, lime juice, garlic, jalapeno, and salt in a blender, then stir in cilantro.
3. Make rub: Finely grind anise seeds and peppercorns in an electric coffee/spice grinder with salt and sugar. Transfer mixture to a small bowl and stir in oil.
4. Grill pork: Brush both sides of pork with spice rub.
5. Grill pork on an oiled rack set 5 to 6 inches over glowing coals 2 minutes on each side. Move pork off to side of grill (not directly over coals; moderately low heat for gas grills) and cook pork, covered, turning once, until just cooked through, about 3 minutes more on each side.
6. Transfer to a platter and let stand, loosely covered, 5 minutes.
7. Serve pork with mojo.

Yield: 4 servings