Step 1: Cook salmon and mackerel according to packet instructions.
Step 2: In the meantime, chop the onion and garlic, fry until soft and put to one side
Step 3: Cook rice according to packet, once water has dried, add the onions, garlic and prawns and mix together. Leave on the hob until prawns are hot.
Step 4: Once fish is cooked, cut into cubes and mix in with the rice mixture.
Step 5: Serve in a bowl and squeeze fresh lemon juice over the top.