Lemon Pepper Chicken Breasts

Name: Lemon Pepper Chicken Breasts
Ingredients: 1 1/2 to 1 3/4 pounds boneless, skinless chicken breasts (about 2 large chicken breasts); 1 1/2 tablespoons lemon pepper seasoning , divided; 1/2 teaspoon kosher salt , plus more to taste; 3/4 cup all-purpose flour; 1 1/2 tablespoons vegetable oil; 4 tablespoons unsalted butter , divided; 2 cloves garlic , minced or grated; 1/2 cup chicken stock; 1/3 cup freshly squeezed lemon juice (from 2 lemons); 1/4 cup Italian parsley , chopped; Lemon slices , for garnish (optional)