Pecan Crusted Catfish Finger Sandwich

Name: Pecan Crusted Catfish Finger Sandwich
Ingredients: Peanut oil, for frying; 3 catfish fillets, dried well; 1 cup pecans; 1/2 cup buttermilk; 1 large egg; 1/2 cup panko bread crumbs; 1 teaspoon garlic powder; 1/4 teaspoon cayenne pepper; Kosher salt and freshly ground black pepper; Honey Mustard Sauce, recipe follows; 4 (6-inch) rolls, split and toasted; Tomatoes, sliced; Curly leaf lettuce, washed; 1/4 cup honey; 1/4 cup Dijon mustard; 2 tablespoons mayonnaise; 1 teaspoon cider vinegar