Italian Tuna Salad

Name: Italian Tuna Salad
Prep time: 15 min
Total time: 15 min
Cuisine: Italian
Ingredients: 1 tablespoon capers (drained and chopped); 2 tablespoons lemon juice (from 1 large lemon); 1 teaspoon Dijon mustard; 1/4 cup extra virgin olive oil; 3/4 teaspoon kosher salt (divided); 1 15 ounce can cannellini beans, drained and rinsed,; 1 6.35 ounce jar tuna packed in olive oil, drained; 1 Belgian endive (cut into 2 inch pieces); 2 small treviso cut into 2 inch pieces; 2 cups baby arugula; 1 small fennel (shaved on a mandolin or sliced thinly with a knife); 1/2 cup Italian parsley leaves