Directions: In a small mixing bowl, gently mix (a rubber spatula works well for this) the tomato, onion, cucumber, garlic, olives, and capers. Stir in the tarragon, olive oil, and lemon juice. Add salt (remember, the capers and olives are salty, so you may not have to add much) and pepper to taste.
Note: An English cucumber, the seedless variety that usually comes shrink-wrapped in plastic, is the preferred cucumber. If you can only find salad cucumbers, peel and seed them before dicing.