Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Slice the baby potatoes in half and place them on the baking sheet, tossing with 0.5 tbsp of olive oil and a pinch of sea salt.
Roast the potatoes for 10 minutes to give them a head start on crisping up.
While potatoes roast, season the chicken breast evenly on both sides with garlic powder, dried oregano, sea salt, and black pepper.
Remove the baking sheet from the oven, move potatoes to one side, and place the chicken breast and trimmed asparagus on the other side.
Drizzle the remaining 0.5 tbsp of olive oil over the chicken and asparagus, then top with minced fresh garlic.
Cut half of the lemon into thin rounds and lay them directly over the chicken breast for moisture and flavor.
Return the sheet to the oven and roast for 15-20 minutes, or until the chicken reaches an internal temperature of 165°F.
Squeeze any remaining juice from the lemon over the entire tray and serve immediately while the potatoes are hot and crispy.