Preheat your oven to 400°F and line a large rimmed sheet pan with parchment paper for easy cleanup.
Cut the chicken breast into uniform 1-inch pieces and place them on the prepared sheet pan.
Add the broccoli florets and the sliced red bell pepper to the pan, spreading them out around the chicken.
In a small glass bowl, whisk together the extra virgin olive oil, fresh lemon juice, minced garlic, dried oregano, sea salt, and black pepper.
Drizzle the lemon-herb mixture over the chicken and vegetables, tossing thoroughly with your hands or tongs to ensure an even coating.
Arrange the ingredients in a single layer across the pan to ensure everything roasts evenly and develops slightly crisp edges.
Place the pan in the center of the oven and roast for 18 to 22 minutes, or until the chicken reaches an internal temperature of 165°F.
Remove from the oven and serve immediately while hot, perhaps with an extra squeeze of lemon for added brightness.