Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Pat the chicken breast dry and rub with 0.5 tablespoons of olive oil, sea salt, black pepper, garlic powder, and dried thyme.
Remove the husk and silk from the corn on the cob, and trim the woody ends off the asparagus spears.
Place the seasoned chicken and the corn on the baking sheet; roast for 15 minutes.
Add the asparagus to the baking sheet, drizzle with a tiny bit of oil if needed, and roast everything for another 10 to 12 minutes until the chicken reaches an internal temperature of 165°F.
While the chicken and vegetables roast, heat the remaining 0.5 tablespoons of olive oil in a small skillet over medium-high heat.
Sauté the seafood mushrooms for 5 to 7 minutes until they are golden brown and slightly crisp.
Remove the corn from the cob if desired, and serve the roasted chicken sliced alongside the asparagus, corn, and sautéed mushrooms.