Place the drained canned beans and celery in a bowl and mix together. Boil or steam the green
beans for 5-6 minutes, or until tender, then drain and refresh under cold running water. Drain
Add the green beans to the canned beans. Whisk the lemon juice with the oil in a pitcher (jug)
and season with salt and pepper to taste. Pour the mixture over the beans and mix thoroughly.
Spoon the beans into a serving bowl and add the tomatoes. Scatter over the onion slices and