1 tablespoon tomato paste
1 tablespoon mild or hot chili powder (or achiote paste)
1 jalapeno, finely minced
1/2 cup orange juice
3 tablespoon fresh lime juice
1 tablespoon olive oil
1 pound pork tenderloin, trimmed
1 small golden pineapple (about 1 1/2 pound), diced into 1-inch cubes
1/2 cup pineapple (or orange) juice
1/4 small red onion, finely chopped
Vegetable oil cooking spray
Heat a large pan over high heat to the smoking point, 3 to 4 minutes. Brown pineapple 4 to 5 minutes, stirring occasionally. Add pineapple juice and stir 1 minute, scraping up brown bits from pan. Remove pineapple from heat. Combine in a bowl with pepper, onion and basil. Mash together and set aside.
Mix tomato paste with chili powder.
Combine with orange juice, lime juice and oil in a double resealable bag.
Add pineapple mixture to the bag.
Add tenderloin and marinate at least 3 hours.
Heat a grill or grill pan over high. Coat with cooking spray.
Remove pork from marinade; place on baking pan. (Discard excess marinade.)
Bake marinated pork in a preheated 350 oven, until pork is no longer pink and internal temperature is 160°F 18 to 20 minutes. Let pork rest 5 minutes before slicing.
Garnish with cilantro leaves before serving.