Flake tuna and place in a large bowl. Add beans, tomato, celery, onion and parsley.
Step 2
Make lemon dressing: Combine lemon rind, 2 tablespoons lemon juice, garlic, oil and sugar in a screw-top jar. Secure lid and shake until well combined.
Step 3
Pour dressing over salad. Season with salt and pepper and stir to combine. Serve.