Fried Shrimp Po-Boy

Name: Fried Shrimp Po-Boy
Prep time: 15 min
Total time: 15 min
Cuisine: American, Southern
Ingredients: 1 1/4 cups buttermilk; 1/4 cup your favorite Louisiana hot sauce; 1/4 cup Emeril's Original Essence or Creole Seasoning; 1 1/2 pounds medium shrimp, peeled and deveined; 1 1/2 cups masa harina; 1 1/2 cups all-purpose flour; 6 cups vegetable oil, for frying; salt and freshly ground black pepper, to taste; Four 6-inch lengths po-boy bread, or French bread, split lengthwise; 2 tablespoons butter, melted; mayonnaise, for dressing the sandwich; shredded lettuce, for serving; 1 medium tomato, thinly sliced