Bring a pot of salted water to a boil and cook the whole grain pasta according to package directions until al dente.
Drain the pasta and rinse under cold water to stop the cooking process and cool it down completely.
Season the chicken breast with a pinch of salt and pepper, then grill or pan-sear over medium-high heat until cooked through.
Let the chicken rest for 5 minutes before slicing into bite-sized cubes.
In a large mixing bowl, whisk together the extra virgin olive oil, lemon juice, minced garlic, dried oregano, sea salt, and black pepper.
Halve the cherry tomatoes, dice the cucumber, finely chop the red onion, and mince the fresh parsley and basil.
Add the cooled pasta, cubed chicken, and chopped vegetables to the bowl with the dressing.
Toss all ingredients thoroughly until evenly coated in the lemon-herb vinaigrette.
Serve immediately or refrigerate for 30 minutes to allow the flavors to meld together beautifully.