Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Toss the cubed sweet potatoes with half of the olive oil, half of the minced garlic, chopped rosemary, and a pinch of salt and pepper.
Spread the sweet potatoes in a single layer on the baking sheet and roast for 20 minutes.
While potatoes roast, season the chicken breast with the remaining salt, pepper, and fresh thyme.
Heat the remaining olive oil in a skillet over medium-high heat and sear the chicken for 5-6 minutes per side until golden and cooked through.
Add the broccoli florets to the baking sheet with the sweet potatoes for the last 10 minutes of roasting until tender.
Stir the remaining garlic into the skillet with the chicken during the last minute of cooking, then finish with a squeeze of fresh lemon juice.
Plate the garlic herb chicken alongside the roasted sweet potatoes and broccoli for a balanced, nutrient-dense dinner.