Pit Manzanilla green olives and cut into a fine brunoise.
Remove seeds from tomato, peel and hollow out the half cucumber, and cut into a fine brunoise.
Squeeze juice from lemon.
Combine all vegetables in a bowl. Add olive oil, balsamic vinegar, lemon juice, salt, and pepper and set aside.
Wash and quarter heads of lettuce.
Pit Manzanilla olives and cut into slices.
Cut red onion into thin slices and soak in cold water for 5 minutes.
Peel, hollow out, and dice cucumber.
Remove seeds from tomatoes and cut into cubes.
Toss all salad ingredients together.
Arrange salad on a plate. Pour 1 to 3 spoonfuls of olive dressing on top.
Mince chives and use to garnish.