Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Chop the broccoli, red bell pepper, and carrots into uniform, bite-sized pieces.
Toss the vegetables on the baking sheet with 0.5 tbsp of avocado oil and a pinch of sea salt and black pepper.
Roast the vegetables in the oven for 18-20 minutes until they are tender and slightly charred at the edges.
While the vegetables roast, season the chicken breast evenly on both sides with garlic powder, dried oregano, and the remaining salt and pepper.
Heat the remaining 0.5 tbsp of avocado oil in a medium skillet over medium-high heat.
Place the chicken in the skillet and sear for 5-7 minutes per side, or until the internal temperature reaches 165°F.
Remove the chicken from the pan and let it rest for 3 minutes to lock in the juices.
Slice the chicken and serve alongside the roasted vegetable medley.