Heat 2 tablespoons oil in a 12-inch skillet over medium heat. Season fish with salt and pepper. In shallow bowl combine flour, cornmeal and 2 teaspoons of seasoning blend. Dredge fish in flour mixture. Increase heat to medium-high. When butter stops foaming add two fish fillets to skillet. Cook until golden brown, about 2-3 minutes. Turn fish and continue to cook 2-3 minutes longer. Transfer fish to platter and keep warm. Repeat procedure with remaining fish fillets. Add broth, lemon juice and remaining seasoning to skillet; boil until reduced by half. Whisk in remaining 2 tablespoons butter and cook until butter is melted. Pour pan sauce over fish and serve immediately.