Bring a large pot of salted water to a boil and cook the chickpea pasta according to package directions until al dente.
While the pasta cooks, finely dice the red onion and cucumber, halve the cherry tomatoes, and roughly chop the fresh parsley.
In a small glass jar or bowl, whisk together the extra virgin olive oil, lemon juice, dried oregano, sea salt, and black pepper to create the dressing.
Drain the canned tuna thoroughly and flake it into bite-sized pieces with a fork.
Drain the cooked pasta and rinse under cold water to stop the cooking process and cool it down.
In a large mixing bowl, combine the cooled pasta, baby spinach, red onion, cherry tomatoes, cucumber, and flaked tuna.
Drizzle the dressing over the salad and toss gently until all ingredients are evenly coated.
Garnish with fresh parsley and serve immediately or chill for 30 minutes to allow flavors to meld.