Preheat oven to 425 F.
Season the pork to taste with salt and pepper; rub the pork with Cajun seasoning.
1 large or 2 small pork tenderloins, Sea salt and freshly ground black pepper, 2 tbsp. Cajun seasoning
Melt some cooking fat (about ½ tbsp.) in a skillet over medium-high heat; cook the pork on all sides until browned (about 2 to 3 minutes per side).
Cooking fat
Place the pork in the preheated oven and bake for 20 to 25 minutes or until desired doneness.
In a saucepan, combine all the ingredients for the pineapple sauce; bring to a boil over medium-high heat.
1 ½ cup pineapple, ½ cup fresh pineapple or orange juice, ¼ cup pure maple syrup or raw honey, 2 tbsp. Dijon mustard, 2 tbsp. coconut aminos, 2 tbsp. apple cider vinegar, 1 tbsp. fresh lemon juice, 2 tsp. Cajun seasoning
Lower the heat and simmer the sauce for 10 to 15 minutes.
Let the pork rest for 4 to 5 minutes before slicing.
Serve the pork topped with pineapple sauce.