Preheat your oven to 400°F (200°C).
In a mixing bowl, combine the minced garlic, 2 tablespoons of olive oil, Italian herbs, salt, and pepper to create a flavorful marinade.
Coat the chicken breasts with this herb-garlic mixture and place them in a baking dish.
In another bowl, toss the halved baby potatoes with the remaining olive oil, salt, pepper, and butter (if you’re using it).
Add the seasoned potatoes to the baking dish alongside the chicken.
Bake in the preheated oven for 20 minutes.
After 20 minutes, add the trimmed green beans to the baking dish and gently stir everything to combine.
Continue baking for another 15-20 minutes, or until the chicken is cooked through and the potatoes are tender.
Once everything is ready, remove from the oven, garnish with fresh parsley, and serve with lemon wedges if desired.