Preheat the oven to 180C.
Cut the pork fillet into 1 cm slices and place them in a shallow dish. Combine the passata, honey, soy, garlic powder and, Chinese five spice, and chilli (if used) in a bowl.
Pour it over the pork and marinate for at least 30 minutes or longer.
Lightly oil a wok, griddle pan or BBQ. Brush the marinade off the pork (but not completely) and seal the medallion for a minute on each side, then place them in a baking dish next to each other and pour over the marinade.
Cover the dish with foil and bake for 20 minutes. Take off the cover and cook for another 5 minutes.
Serve warm.