3 tuna sandwich bagnat Recipes

white onion, thinly sliced, a small red onion, thinly sliced, extra-virgin olive oil, plus additional for drizzling, red-wine vinegar , plus additional to taste, salt , plus additional to taste, black pepper to taste, tuna packed in olive oil (see above) including olive oil, lemon juice to taste, lettuce leaves , combination of boston, green-leaf, or other green leafy lettuce, tomato slices, hard-boiled eggs slices, anchovy fillets, drained, nicoise olives, scallions, chopped, radishes, sliced

eggs, fresh albacore tuna steaks, salt, freshly ground black pepper, divided, french bread baguette , halved lengthwise, quick pickled dilly green beans, thick) tomato slices, sliced fennel bulb (about 1/2 small bulb), kalamata olives, pitted and coarsely chopped, extra-virgin olive oil, arugula leaves