Bean and potato salad

.1 kg potatoes
. 250 g fresh green beans
. 2 onions (cut into slices)
. 3 fresh tomatoes (cut into slices)
. 2 oranges (peeled and cut into slices)
. 2 tbsp fresh chopped coriander
. 2 tbsp vinegar
. 4 tbsp olive oil
. Salt

.peel potatoes and cut into dices
. Trim green beans
.In a saucepan pours water, add salt and bring to boil
.Add potato dices and bean. Cook till potato become soft
.remove from heat, drain vegetables and put in a large salad plate
.in a small bowl, add vinegar, olive oil and coriander, mix and leave aside
.add onion, oranges and tomatoes to the cooked vegetables
.add vinaigrette mixture to the vegetables, mix well and serve