Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
In a large bowl, toss the broccoli florets with 0.5 tbsp of olive oil and half of the sea salt and black pepper.
Spread the broccoli on the baking sheet and roast for 15-20 minutes until the edges are crispy and charred.
While the broccoli roasts, season the chicken breast evenly on both sides with the dried rosemary, dried thyme, and the remaining salt and pepper.
Heat the remaining 0.5 tbsp of olive oil in a stainless steel or cast-iron skillet over medium-high heat.
Place the chicken in the hot skillet and sear for 6-7 minutes per side, or until the internal temperature reaches 165°F and the exterior is golden brown.
Reduce the heat to low, add the minced garlic and lemon juice to the pan, and spoon the juices over the chicken for 1 minute.
Remove the chicken from the pan, sprinkle with parmesan cheese, and serve immediately alongside the roasted broccoli.