Add onion, carrot, celery, and garlic to a food processor (a mini one works well if you have it). Pulse until finely chopped. It should be about 1 cup of vegetable mixture after chopping.
1 medium yellow onion, cut into quarters, 1 medium carrot, peeled and trimmed, cut into large chunks, 1 stalk celery, cut into large chunks, 1 clove garlic, peeled
In a large bowl, whisk the eggs until blended. Add the chopped vegetables, meat, bread crumbs, milk, ¼ cup ketchup, Worcestershire sauce, salt, and pepper. Mix together until well combined, but don’t overmix. (Hands are really the best tool for this part!)
2 large eggs, 2 pounds ground meat, 1 cup panko bread crumbs, ¼ cup milk, ¼ cup ketchup, 1 tablespoon Worcestershire sauce, 1 teaspoon kosher salt, ½ teaspoon coarsely ground black pepper
Form into a loaf and place in the slow cooker.
Cook for 6 hours on low or 3 hours on high. In the last 60 minutes of cooking time, mix glaze ingredients in a small bowl and brush over the meatloaf, and continue cooking until internal temperature of meatloaf is at least 165ºF when checked in center of the meatloaf.
¼ cup ketchup, 2 tablespoons packed brown sugar, 1 tablespoon red wine vinegar
Carefully remove meatloaf from slow cooker (we use two sturdy spatulas to do this but you can cut it in half first if you’re having troubles) and place on a serving platter. Garnish with fresh parsley, slice into 8 slices, and serve.
chopped fresh parsley for garnishing, optional
Notes
What kind of meat to use: Meatloaf can be made with any combination of ground meat, or just one kind of ground meat. We prefer this recipe with a combination of 1 pound lean ground beef (92/8) and 1 pound ground pork. Other combinations of meat can be used but will affect the final outcome. If you choose to use all beef, we recommend ground beef that is less lean such as 85/15 or 80/20.
Nutrition information is calculated using 1 pound lean ground beef (90/10) and 1 pound ground pork.
No food processor? Finely mince or grate the vegetables instead.
More cooking methods: This meatloaf recipe can be baked or air fried, too.