Steps
1. Cook the pasta according to package instructions until al dente. Drain and rinse under cold water.
2. In a bowl, combine the drained tuna, mayonnaise, diced celery, diced red onion, and lemon juice. Mix well.
3. Add the cooled pasta to the tuna mixture and stir until evenly combined. Season with salt and pepper to taste.
4. Spoon the mixture into small serving cups or on crackers for easy bites.
5. Garnish with fresh parsley if desired and serve immediately.