Preheat your oven to 400°F and line a large sheet pan with parchment paper for easy cleanup.
Dice the sweet potato into half-inch cubes, chop the red bell pepper into bite-sized pieces, and cut the chicken breast into uniform one-inch chunks.
Place the chicken, sweet potato cubes, broccoli florets, and bell pepper pieces onto the prepared sheet pan.
Drizzle the extra virgin olive oil over the ingredients and squeeze the juice of the half lemon across the pan.
Sprinkle the dried oregano, thyme, garlic powder, sea salt, and black pepper evenly over the chicken and vegetables.
Use your hands or tongs to toss everything together until every piece is thoroughly coated in oil and seasoning.
Spread the mixture into a single layer, ensuring the chicken pieces are not touching for optimal browning.
Roast for 20 to 25 minutes, or until the chicken is cooked through and the sweet potatoes are tender when pierced with a fork.
Garnish with fresh lemon zest and divide into meal prep containers for a healthy, ready-to-eat meal throughout the week.