One of the classic steakhouse sides is a tomato salad of some sort. Like this recipe, the best ones are super simple, and really focus on perfect, ripe tomatoes.
Slice the onion in half, then thinly slice the halves (either direction is fine, just different looks).
Core the tomatoes and cut them into 1-inch pieces.
In a large bowl, toss the onions and tomatoes with the vinaigrette. Serve at room temperature.
Notes
If your tomatoes aren’t perfectly ripe…just don’t make this salad. Make tomato sauce, or if tomatoes are not in season, just wait until they are.
Also, never put your tomatoes in the fridge unless they are threatening to turn to mush and you are planning to cook them anyway. Cold changes the texture of tomatoes, making them mealy and sapping their flavor.
You can hold the salad for a couple of hours before serving, but again, keep it at room temperature.