1. Preheat the oven to 325 degrees
  2. Heat the olive oil in a medium saute pan
  3. Add the onions, thyme, salt, and pepper and cook over medium-low heat, stirring occasionally, for 8 to 10 minutes, until the onions are translucent but not brown
  4. Off the heat, add the Worcestershire sauce, chicken stock, and tomato paste. Allow to cool slightly
  5. In a large bowl, combine the ground beef, onion mixture, bread crumbs, and eggs, and mix lightly with a fork. Don’t mash or the meat loaf will be dense.
  6. Shape the mixture into a rectangular loaf on a sheet pan covered with parchment paper
  7. Spread the ketchup evenly on top. Bake for 1 to 1 ¼ hours, until the internal temperature is 160 degrees F and the meat loaf is cooked through. (Note: a pan of hot water in the oven, under the meat loaf, will keep the top from cracking)
  8. Serve hot