For the sauce, heat a frying pan and add 1½ tablespoons of oil. Fry the onions, then add the diced paprika and fry over medium heat for approx. 2 minutes, deglaze with the orange juice and reduce for approx. 3 minutes. Fold in the pineapple pieces, then add soy sauce, tomato ketchup, vinegar, honey, pineapple juice, Asian spice and chili powder. Slowly reduce to the desired consistency, stirring constantly, then season to taste.
Season the pangasius fish fillets with salt and pepper. Put the flour on a plate, turn the fish fillets in it, shake off the excess flour. Fry the fillets in a large pan in hot clarified butter over medium heat for a total of 6-8 minutes until golden brown, turning once.