Bring a large saucepan of salted water to the boil. Cook the fusilli pasta according to the packet instructions until tender.
Drain the pasta well and rinse under cold water until fully cooled. Set aside to drain completely.
Meanwhile, prepare the vegetables by finely chopping the red bell pepper, dicing the cucumber, and finely chopping the red onion.
In a large mixing bowl, add the Greek yoghurt, lighter than light mayonnaise, reduced salad cream, lemon juice, garlic granules, salt, and black pepper. Stir until smooth and well combined.
Add the cooled pasta, drained tuna, chopped red bell pepper, cucumber, red onion, and drained sweetcorn to the bowl.
Mix everything together until the pasta and vegetables are evenly coated in the dressing.
Taste and adjust with extra salt, black pepper, or lemon juice if needed.
Serve and Enjoy!