Before you start cooking: Preheat the oven to
340 °F. Pour about ½ inch of water into the baking dish. The water and fat create delicious drippings that you can pour over the Sekaná while it bakes. Peel 2 medium onions and chop them finely. Peel 4 cloves garlic and mince them finely, or use a garlic press.
Add cubed 1 and ½ cups white bread to a shallow bowl and pour over ¾ cup milk. Allow the bread cubes to soak up all the milk; this takes about 5 minutes.
Place ½ pound ground pork meat and ½ pound ground beef meat in a large mixing bowl.
Add chopped onion, minced garlic, 1 egg, and soaked bread. Season with ½ teaspoon crushed caraway seeds, ½ Tablespoon dried marjoram, and ½ teaspoon ground black pepper. Add 2 teaspoons salt.
Mix everything together, preferably with your hands. Start with a fork, then continue with your fingers until you achieve a smooth consistency, which takes about 2-3 minutes. If the meatloaf mixture seems too thin, add some breadcrumbs.
Shape the mixture into a loaf, carefully transfer it to a baking tray, and smooth the surface.
Roast the meatloaf for 1 hour, basting it with the drippings from the bottom of the baking dish at least twice during cooking.
Remove it from the oven and let it rest for 10 minutes before serving.
Serve warm, sliced, with potatoes (mashed or boiled).