Preheat your oven to 425°F (220°C).
In a large bowl, combine the olive oil, minced garlic, Italian seasoning, salt, and black pepper. Mix well.
Add the chicken thighs to the bowl and toss to coat them evenly with the garlic mixture.
In a separate bowl, toss the halved baby potatoes with a little olive oil, salt, and pepper.
Arrange the chicken thighs skin-side up on a large baking sheet. Scatter the potatoes around the chicken.
Sprinkle the grated Parmesan cheese evenly over the chicken and potatoes.
Bake in the preheated oven for 35-40 minutes, or until the chicken is cooked through (internal temperature of 165°F) and the potatoes are tender.
For extra crispiness, broil for an additional 2-3 minutes at the end of cooking.
Remove from the oven and let it rest for 5 minutes. Garnish with fresh parsley before serving.