- 6 (1/4 inch thick) slices tomato
- 6 red onion slices
- 2 tablespoons olive or vegetable oil
- 4 teaspoons red wine vinegar
- 2 tablespoons chopped fresh basil
- 1 teaspoon sugar
- Place tomatoes in a shallow dish; top each slice with an onion. In a small jar with tight-fitting lid, combine remaining ingredients; shake well. Pour over tomatoes and onions. Cover and refrigerate for at least 1 hour.