1 tablespoon salt
1 pound green beans (or a combination of green and yellow wax beans, trimmed)
1 can tuna packed in oil (drained and flaked. 3.5 ounces)
1/4 cup extra-virgin olive oil
2 tablespoons mayonnaise
  grated zest of 1 lemon
2 teaspoons fresh lemon juice
2 tablespoons capers (rinsed, divided)
2 tablespoons chopped Italian flat leaf parsley
  Salt and freshly ground black pepper (to taste)
  Lemon wedges (as garnish, optional)