Preheat your oven to 400°F and line a large sheet pan with parchment paper for easy cleanup.
Cut the chicken breast into 1-inch bite-sized pieces and slice the baby potatoes into halves.
Place the chicken pieces, halved potatoes, broccoli florets, and sliced red bell pepper onto the prepared sheet pan.
Drizzle the extra virgin olive oil over the chicken and vegetables.
Sprinkle the dried oregano, garlic powder, sea salt, and black pepper evenly across the pan.
Toss all ingredients together with your hands or tongs until everything is thoroughly and evenly coated in oil and spices.
Spread the mixture out into a single layer, ensuring the ingredients are not overcrowded to allow for proper roasting.
Bake for 20 to 25 minutes, or until the chicken is cooked through and the potatoes are fork-tender.
Remove from the oven and immediately drizzle with fresh lemon juice to brighten the flavors before serving.