Preheat your oven to 425°F. Line a sheet pan with parchment paper for easy cleanup.
In a small bowl, combine the cornstarch, garlic powder, and ginger powder. Pat the chicken breast dry and lightly coat with the cornstarch mixture, shaking off any excess.
Place the coated chicken on one side of the sheet pan. In a separate bowl, toss the broccoli with olive oil, a pinch of salt, and pepper.
Arrange the broccoli on the sheet pan in a single layer.
In another bowl, mix the fresh orange juice with orange zest. Once the chicken and broccoli are in the oven, drizzle the orange mixture over the chicken.
Bake the chicken and broccoli in the preheated oven for 18-20 minutes, or until the chicken reaches an internal temperature of 165°F and the broccoli is tender and slightly charred on the edges.
If you desire extra crispiness on the chicken, switch the oven to broil for the last 2-3 minutes of cooking, keeping a close eye to prevent burning.
Remove from the oven, let rest briefly, and serve warm.