5 chicken breasts boneless and skinless • 6 tablespoons unsalted butter divided • 12 teaspoon kosher salt • 14 teaspoon coarse ground black pepper • 1 teaspoon Italian seasoning • 2 lemons juiced and zested • 2 garlic cloves minced • 1 cup half and half • 1 tablespoon cornstarch • 1 tablespoon chicken base optional but delicious