How to Make It
Preheat the oven to 350°. In a spice grinder, combine the celery seeds, fennel seeds, peppercorns and star anise and grind to a powder.
In a large skillet, heat the oil. Add the onion, minced fennel, celery, garlic, pimentón and the ground spices and cook over low heat, stirring occasionally, until the vegetables soften, about 8 minutes. Let cool to room temperature.
In a food processor, pulse the bacon until finely ground. In a large bowl, mix the bacon with the ground beef. Mix in the eggs and maple syrup followed by the vegetable mixture, bread crumbs, pistachios and salt.
Pat the meat mixture into two 9-by-4-inch loaves and set them on opposite sides of a large rimmed baking sheet. Bake for about 1 hour, or until an instant-read thermometer inserted in the center of each loaf registers 160°. Let rest for 10 minutes. Cut the meat loaf into thick slices and serve with the Prune Ketchup.
Smoked sea salt is available at specialty food stores and at SaltWorks.