Transfer the salmon to a plate and return the pan to a medium heat. Add the onion and a pinch of salt and fry for 7 min until soft. Add the garlic, apple, paprika, cumin and a pinch of cinnamon and cayenne (spicy!). Fry for 1 min. Add the tomato paste, water, 0.5/1/1 stock cube and sugar. Simmer for 5 min.