To make a traditional tuna salad, you need little more than a can of tuna, some mayonnaise, a few crunchy elements like chopped onion and celery, and some easy-to-find flavorings like mustard ... new ...
In a large pot, heat the olive oil over medium heat then quickly add the onions, carrots and celery before leaving to cook for 10 minutes until soft. Now add the garlic and fry for another 30 seconds ...