1. In a bowl, combine the olive oil, minced garlic, Italian seasoning, salt, pepper, and lemon juice. Add the chicken breasts and coat evenly. Let marinate for at least 30 minutes.
2. Preheat your Blackstone griddle to medium-high heat (375°F).
3. Place the marinated chicken on the griddle, searing each side for about 5-7 minutes until golden brown and cooked through (internal temperature should reach 165°F).
4. In a small saucepan over medium-low heat, melt butter and stir in additional minced garlic until fragrant (about 1 minute). Pour this mixture over the cooked chicken along with the grated parmesan.