Method
Clean celery. Dry and finely chop
Chop scallions
Rinse beans thoroughly with cold water and drain
Drain tuna of oil or water
Place these ingredients in a large bowl
Zest lemon, cut in half and juice completely, removing any seeds
Put lemon zest and juice into a small bowl. Whisk in the olive oil. Add thyme leaves and chopped oregano
Pour over tuna mixture and gently mix until fully coated
Salt and pepper to taste
Top servings with shaved Parmesan and serve