White Bean and Tuna Salad

Name: White Bean and Tuna Salad
Ingredients: 1 cup chopped red onions or shallots; The zest and juice of 1 lemon or 2 limes (can sub a tablespoon or two of cider vinegar); 2 (5- to 6-ounce) cans tuna packed in olive oil; 2 (15-ounce) cans cannellini or Great Northern white beans , rinsed and drained; 1/2 cup (loosely packed) chopped parsley or arugula, or 2 tablespoons thinly sliced mint; A few splashes Tabasco sauce, or 1 minced Serrano chili or 1 teaspoon red chili flakes; 1/2 teaspoon freshly ground black pepper; Salt and more extra virgin olive oil, to taste