Preheat your oven to 400°F and line a large rimmed sheet pan with parchment paper for easy cleanup.
Cut the chicken breast into 1-inch bite-sized pieces and halve the baby potatoes to ensure they cook at the same rate.
In a small bowl, whisk together the extra virgin olive oil, lemon juice, dried oregano, garlic powder, sea salt, and black pepper.
Place the chicken, potatoes, broccoli florets, and sliced red bell pepper onto the prepared sheet pan.
Drizzle the lemon-herb dressing over the ingredients and toss thoroughly with your hands or tongs until everything is evenly coated.
Spread the mixture out into a single layer, ensuring the chicken and vegetables are not overcrowded to allow for proper roasting.
Roast in the center of the oven for 20 to 25 minutes, or until the chicken is cooked through and the potatoes are fork-tender.
Remove from the oven, garnish with finely chopped fresh parsley, and divide into meal prep containers.