Blanch the green beans by adding them to a pot of already boiling water.
Let them cook in the boiling water 2-3 minutes.
Meanwhile, fill a large bowl with ice water.
Drain the green beans and pour them into the ice water to stop the cooking process.
Drain again and add to the salad bowl.
Stir in the tomatoes.
Sprinkle with kosher salt, pepper and add a splash of red wine vinegar.
Adjust seasonings and serve.
This recipe holds well in the refrigerator for a couple of days.