A main-dish salad from France accented with red potatoes.
Quarter potatoes. Place in large pot; pour over enough water to cover. Set over high heat and bring to a boil. Boil 10 minutes or until potatoes are tender. Drain.
Arrange potatoes on platter with tuna, asparagus, radishes, olives, and onion.
In small bowl, whisk vinegar, parsley and olive oil; drizzle over salad. Season with salt and pepper.