Ingredients

• 400
  g
  French-cut green beans, blanched
• 450
  g
  firm tomatoes, thickly sliced
• 6
  hard-boiled eggs, halved
• 100
  g
  black olives
• 185
  g
  tuna
• 8
  baby potatoes, boiled in their jackets
• 1
  onion, peeled and sliced
• Herb vinaigrette dressing:

• 125
  ml
  red wine vinegar
• 3
  cloves garlic, crushed
• 15
  ml
  Dijon mustard
• 5
  ml
  sugar
• 3
  sprigs fresh thyme, chopped
• 1
  small bunch fresh parsley, chopped
• 300
  ml
  olive oil
• seasoning