1/2 cup creole mustard (for testing purposes, we used zatarain's creole mustard) |
2 tablespoons ketchup |
1 teaspoon worcestershire sauce |
2 teaspoons prepared horseradish |
1 medium garlic clove, finely chopped (about 1 teaspoon) |
1 teaspoon freshly squeezed lemon juice |
1 1/2 teaspoons paprika |
1/4 teaspoon ground white pepper |
1/8 teaspoon finely ground black pepper |
1/8 teaspoon cayenne pepper, or to taste |
salt, to taste |
2 tablespoons olive oil |
1/4 cup finely chopped celery ribs, with leaves |
1 1/2 teaspoons finely chopped fresh parsley |
1 tablespoon grated white or yellow onion |
1 tablespoon finely chopped green onion top |
hot sauce (crystal, louisiana, or tabasco brand), if desired |