Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Dice the chicken breast into bite-sized pieces and chop the zucchini and red bell pepper into uniform chunks.
Place the chicken and vegetables on the baking sheet and toss with olive oil, dried oregano, sea salt, and black pepper until evenly coated.
Roast in the oven for 18 to 20 minutes until the chicken is fully cooked and the vegetables have developed a golden, caramelized exterior.
While the tray roasts, bring a pot of water to a boil and cook the red lentil pasta according to the package instructions until al dente.
Drain the pasta and transfer it to a large mixing bowl.
Whisk together the lemon juice, minced garlic, and chopped fresh parsley in a small bowl to create the dressing.
Add the roasted chicken and vegetables to the pasta bowl, pour the lemon-garlic dressing over the top, and toss everything together until well combined.