Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Peel and dice the sweet potato into 1/2-inch cubes, then toss them on the baking sheet with 0.5 tbsp of olive oil, a pinch of sea salt, and black pepper.
Roast the sweet potatoes for 20-25 minutes, tossing halfway through, until they are tender and caramelized on the edges.
While the potatoes roast, season the chicken breast evenly on both sides with dried oregano, garlic powder, sea salt, and black pepper.
Heat the remaining 0.5 tbsp of olive oil in a medium skillet over medium-high heat.
Place the chicken in the skillet and cook for 6-7 minutes per side, or until the internal temperature reaches 165°F and the exterior is golden brown.
During the last 5 minutes of chicken cooking, steam the broccoli florets in a steamer basket over boiling water until they are vibrant green and crisp-tender.
Remove the chicken from the heat and drizzle with fresh lemon juice to brighten the flavors.
Plate the lemon herb chicken alongside the roasted sweet potatoes and steamed broccoli for a balanced post-workout meal.