3 seared tuna nicoise mustard Recipes

eggs, quartered small red potatoes, haricots verts, trimmed, tuna steaks, kosher salt, divided, freshly ground black pepper, extra-virgin olive oil, red wine vinegar, dijon mustard, grape tomatoes, halved, pitted and quartered nicoise olives

garlic cloves, minced, dijon mustard, red wine vinegar, lemon, juiced, chopped fresh flat-leaf parsley, minced fresh tarragon, sea salt and freshly ground black pepper, extra-virgin olive oil, red new potatoes , scrubbed and halved, eggs, haricots verts or french green beans, stems trimmed, fresh sushi-quality tuna, extra-virgin olive oil, sea salt and freshly ground black pepper, teardrop or cherry tomatoes, halved, nicoise olives, anchovy fillets, caper berries with stems, fresh chives, snipped in 1/2