Step 1

Arrange a rack in the center of the oven and preheat to 450 degrees F. Line a rimmed baking sheet with foil.

Step 2

Whisk the eggs, milk, Worcestershire sauce and 2 teaspoons salt in a large bowl until completely combined. Heat the oil in a large skillet over medium-high heat. Add the onion, garlic, thyme, 1/2 teaspoon salt and 1 teaspoon pepper and cook, stirring occasionally, until the onions are tender and lightly golden brown, 8 to 10 minutes.

Step 3

Add 3 tablespoons of the ketchup and cook until most of the moisture has evaporated and the mixture is thick and brick red colored, 3 to 4 minutes. Remove the skillet from the heat and let the onions cool slightly. Then add them to the beaten eggs and mix to combine.

Step 4

Add the beef to the egg and onion mixture. Break up the meat with a fork or wooden spoon, and then mix to thoroughly combine; you don't want to see any lumps of raw beef. Add the panko and mix to combine. Stir the meat vigorously with a wooden spoon for about 7 seconds; it will become more homogenous and tackier.

Step 5

Transfer the meat to the prepared baking sheet and shape into a 9-by-5-inch loaf. Smooth the top and evenly spread the remaining ketchup over top. Bake for 5 minutes, and then reduce the oven temperature to 350 degrees. Continue to bake until an instant-read thermometer inserted into the center of the loaf registers 150 degrees F, 30 to 35 minutes. Allow the meatloaf to rest for 20 minutes before slicing.