Finely chop the onion and garlic. Remove the tomato stem, cut into wedges, and halve them.

Cut the fresh salmon into small bite-sized pieces.

Heat half the olive oil (1/2 tbsp) in a frying pan over medium heat. Add the salmon and cook until both sides are browned. Remove from the pan.

In the same pan, add the remaining olive oil (1/2 tbsp), onion, and garlic. Sauté over medium heat until the onion becomes translucent.