Cook the pasta according to package instructions until al dente. Drain and rinse under cold water.

In a large mixing bowl, combine the cooked pasta, drained tuna, cherry tomatoes, cucumber, red onion, and sweet corn.

In a small bowl, whisk together the mayonnaise, lemon juice, dijon mustard, salt, and black pepper.

Pour the dressing over the pasta mixture and toss to combine. Add chopped parsley and mix well.

Chill in the refrigerator for at least 30 minutes before serving. Enjoy!