Cut the potatoes into equal sizes. Add to a saucepan with cold water and had a good amount of salt. Bring the boil and allow to simmer for 15 to 20 minutes until cooked through. A tip to see if they are cooked, put a knife into one of the potatoes and if the potatoes fall straight off, they are cooked. Drain the potatoes and rinse with cold water to cool them.
Take a separate saucepan of water and bring to the boil, add the eggs and cook for seven minutes. For the last 30 seconds of cooking add the trimmed Green beans to the water. Remove the eggs and green beans and add an ice bath to stop the cooking process. Peel eggs snd cut into four.
Shred the lettuce, slice the red onion and cut the tomatoes into segments. Drain the tuna.
Mix everything for the dressing together in a small jar or bowl with a pinch of salt and pepper.
Add everything for the salad into a bowl apart from the eggs. Add the dressing and toss. Now add the eggs and gently toss through.
