Italian Potato Salad

1 lb. of green beans
1 lb. of boiling potatoes (red skins)
1 red onion-slice 3 ripe vine tomatoes
3/4 cup of olive oil
1/4 cup of red wine vinegar
1 tsp. of oregano
Salt to pepper to taste

Boil potatoes with the skins on.
Cook the beans in salted water until tender.
Cut the tomatoes and slice the onions.
When beans and potatoes are done, cut them into smaller pieces.
Put into a large salad bowl and toss with oil and vinegar. Season the salad with salt, pepper and dried oregano.