Dempseys Boudin Ball PoBoy

Name: Dempsey's Boudin Ball Po'Boy
Ingredients: 2 stalks celery, rough chop; 1/2 medium yellow onion, rough chop; 1 teaspoon capers, with brine; 1 teaspoon lemon juice; 1 teaspoon Worcestershire sauce; 1 cup mayonnaise; 2 tablespoons ketchup; 2 tablespoons Creole mustard (or stone-ground mustard); 1/2 teaspoon Creole seasoning; 1/2 teaspoon ground black pepper; 1/2 teaspoon cayenne pepper; 1/2 teaspoon salt, if desired; 1/2 teaspoon your favorite hot sauce; 3 eggs; 2 cups milk; One 8-ounce box seasoned panko breadcrumbs; Two 12-ounce packages boudin links; 6 small loaves French bread (or buns of choice); Mayonnaise or another sandwich spread, for serving; 6 lettuce leaves, whole or sliced; 1 ripe tomato, sliced