Preheat your oven to 425°F (220°C) and line a large baking sheet with parchment paper.
Pat the chicken legs thoroughly dry with paper towels to ensure the skin becomes crispy during roasting.
In a small ramekin, combine the sea salt, black pepper, dried rosemary, dried thyme, and garlic powder.
Place the chicken legs on the baking sheet and rub with 0.5 tablespoon of olive oil, then coat evenly with the herb spice blend.
In a mixing bowl, toss the broccoli florets with the remaining 0.5 tablespoon of olive oil and a pinch of salt.
Roast the chicken legs in the center of the oven for 20 minutes.
Arrange the broccoli florets on the same baking sheet around the chicken and continue roasting for another 15 to 20 minutes.
Remove from the oven once the chicken reaches an internal temperature of 165°F and the broccoli is tender and slightly charred.
Drizzle the fresh lemon juice over the chicken and broccoli before serving hot.