Couscous salad with Adriatic Queen tuna fillets in olive oil

1. First, prepare the couscous. Heat some water (the quickest way is with a kettle), pour it over the couscous in a bowl, and cover it.
2. Let stand for about 5 minutes until the couscous absorbs all the liquid and softens.
3. For a richer taste, you can add half a vegetable cube to the water before pouring the couscous.
4. While the couscous is resting, prepare the vegetables.
5. Cut the purple onion into thin strips, and finely chop the tomato, cucumber, pepper, and olives.
6. In a large bowl, combine the drained tuna with oil from the can and the prepared vegetables.
7. Season with salt, pepper and lemon juice to taste.
8. Finally, add the softened couscous and mix everything well.
9. Sprinkle with freshly chopped parsley, if desired, and serve immediately.