Side dishes don't get any easier than this one. All you need to do is slice up the tomatoes and drizzle with a mixture of olive oil, vinegar, and tarragon.
Prepare this one hour before you eat, and serve it at room temperature.
Combine first 4 ingredients in a bowl, stirring well. Arrange tomatoes on a platter. Sprinkle tomatoes evenly with salt and pepper; drizzle with shallot mixture.