Excellent way to serve tuna and you can enjoy it warm or cold. I followed exactly the directions, except for cooking the tuna. I have seared it before cutting it into cubes. I like the use of red onion, because it is more delicate in taste than yellow onions. The tomatoes and cucumber add a wonderful fresh note (and I think the salad could be chilled in summer to support this fresh note). The beans melt all the different flavors and are an excellent counterpart for the tuna. I would suggest to use this dressing, because the fresh herbs are fantastic. I like this salad, because it is easy to make and full of flavors. And it is a fantastic way to serve very fresh tuna.