For the dressing: Mix all the ingredients in a small bowl or jug. Season well.
1 tablespoon extra virgin olive oil, 1 teaspoon white wine vinegar, 1 lemon, sea salt & cracked black pepper
For the salad: Place all the ingredients in a medium bowl and combine. Drizzle over the dressing and toss gently.
400 g canned four bean mix, 1 cup baby spinach, 1 cup cherry tomatoes, 400 g canned corn, 2 celery sticks, 1 lebanese cucumber, 185 g canned tuna, 1/2 red onion