Preheat the oven to 350°F with a rack in the center position. Grease a large rimmed sheet pan.

In a large bowl, combine the ground beef, ground pork, and breadcrumbs using your hands.

In a medium bowl, whisk together the eggs, milk, salt, Italian seasoning, pepper, garlic powder, and onion powder.

Pour the egg mixture and 3 tablespoons of ketchup into the meat mixture. Mix with hands until fully combined.

In a small bowl, mix together the remaining 1 tablespoon ketchup, brown sugar, Worcestershire sauce, and 1 teaspoon water until fully combined.

Using your hands, form the meat mixture into ovals about 3 inches wide and 4 inches long and place them on the prepared sheet. You should have 6 mini loaves. Brush the brown sugar sauce over the tops of the meatloaves.

Bake for 30 minutes, or the internal temperature reaches 160°F on an instant-read thermometer.

Divide meatloaves between plates and serve with mashed potatoes and broccolini.