In a large bowl, combine tomatoes, bell pepper, cucumber, onion, and capers. In a small bowl, whisk together the vinegar and oil; season, to taste, with salt and pepper. Pour dressing over vegetables and toss thoroughly but gently. Spread croutons in a single layer in a large serving bowl. Spoon vegetables evenly over the croutons and pour any remaining liquid in the bowl over all.
Recipe courtesy Sandra Lee