chicken potato salad

When it's hot out who wants to cook heavy hot meals.  Not me, so we eat things that can be grilled, fixed ahead or served cold.  This is one of those salads you can put just about anything you want into and it would be great.
Cooked chicken buy a roast chicken from the store and you're ahead of the game.
4-5 potatoes cooked and peeled
1 can green beans or use fresh
2 large tomatoes
1 onion sliced thin
1 can black olives drained
1 lemon juiced
1/2C olive oil
2 cloves garlic minced
salt and pepper to taste
Lay meat and vegies out on a platter.  Mix the juice, oil and seasoning together and pour over the salad.  Serve with garlic bread and cookies for dessert and even a picky eater can find dinner happiness.