I call it "salada"...it's also called "Italian salad", and there is no recipe.
Just cut up a cucumber or 2, a bell pepper, I like to cut the cuke into chunks and the pepper into 1/2 inch squares, peel and cut up a tomato or 2...or 3 or 4, and cut up a sweet onion.
There are no measurements, I just ues about equal quantities of cuke and tomato and a little less pepper and onion.
Then lightly sprinkle all with salt and sugar....toss together. Drizzle with a little, cider vincgar and a little olive oil, sprinkle with fresh ground pepper and some chopped fresh basil. I don't use oregano in this, but add some if you like.
Linda C

Don't thisk this is exactly it but it's very good:
FIRE & ICE (serves 6)
2 large red onions, cut into 1/4" slices
6 large firm tomateos, peeled & quartered
1 bell pepper, cored & cut into strips
3/4 cup cider vinegar
1 1/2 tsp celery seed
1 1/2 tsp mustard seed
1/2 tsp salt
2 TBL sugar
1/2 tsp cracked black pepper

Place the onions, tomatoes & bell pepper strips in a bowl. In a small saucepan, bring the vinegar, 1/4 cup water & the seasonings to a boil. Boil 1 minute only. While still hot, pour over the vegetables. Chill~~Cotton Country Collection

Here's one I do -

Tomato Onion Salad

1/4 cup Balsamic vinegar
3 tablespoons of water
1 tsp olive oil
1 tsp Dijon mustard
1/4 tsp Freshly ground black pepper
1/8 tsp Salt
5 Medium tomatoes, unpeeled
1 large purple onion
2 tsp minced fresh oregano or 1/2 t Dried oregano

COMBINE first 6 ingredients in a jar; cover tightly and shake vigorously. Set aside.

CORE tomatoes; cut each into 6 slices. Thinly slice onion and separate into rings. Layer tomato and onion in a shallow dish; sprinkle with oregano. Pour vinegar mixture over vegetables; cover and marinate in refrigerator 3 hours.

Thanks everyone. I am anxious to try this with tomatoes right from the garden :)

I do pretty close to the same thing as Lindac, but using red & yellow cherry toms cut in half, no green pepper, and just an Italian Dressing. It's really good with crumbled feta too!

Linda