Piquillo Peppers Stuffed with Salt Cod

Name: Piquillo Peppers Stuffed with Salt Cod
Ingredients: 1 (28 ounce) can of tomatoes, chopped, liquid reserved; 1 pound salt cod, soaked (see Notes); 1 teaspoon kosher salt, plus additional as needed; 1/3 cup extra virgin olive oil; 2 large eggs beaten with 2 tablespoons water; 2 small onions, finely chopped; 2 sprigs thyme; 2 tablespoons all purpose flour, plus additional for dredging; 2 tablespoons chopped curly parsley; 4 cups whole milk, warmed; 8 large cloves garlic, minced; Freshly ground black pepper; ¼ teaspoon sugar; ½ stalk celery, finely chopped; ½ teaspoon sweet paprika