Step 1: Dice the red bell pepper, cucumber, and red onion into small cubes.

Step 2: Grate the cheese using a coarse grater.

Step 3: In a bowl, mix the yogurt, mayonnaise, lemon juice, chopped parsley, salt, and pepper until smooth and well combined.

Step 4: Cook the pasta: Boil the pasta in salted water according to the package instructions. Drain well without rinsing, then transfer to a large bowl.

Step 5: Add the diced vegetables, sweet corn, drained tuna, grated cheese, and dressing to the pasta.

Step 6: Toss gently until everything is evenly coated and serve.

Enjoy!