Salade niçoise au thon

tuna 23.0% , potato 20.0% , tomatoes 15% green beans 12.0% , onion 8.0% , water 18.5% , rapeseed oil 9.3% , black olive 3.5% , red bell pepper 2.5% , extra virgin olive oil 1.6% , salt 0.8% , white wine vinegar 0.4% , sugar 0.2% , natural flavouring 0.1% , thickening 0.1% , basil 0.0% , natural pepper flavouring 0.0%