Tuna Provencale on a Baguette

Ingredients

• 2 large tomatoes (peeled and chopped)
• 5 black olives (not oil-packed) (pitted and finely chopped)
• 1 baguette ((whole wheat if possible), about 60 cm long)
• 2 tbsp extra virgin olive oil
• 1 large onion
• 1 large green pepper
• 2 170g cans tuna in water (drained)
• 2 tbsp white wine vinegar
• 2 garlic cloves (finely chopped)