Heat the olive oil in a large (12-inch) sauté pan over medium heat. Add the onion & celery and cook for 5 to 7 minutes, stirring occasionally, until the onion is translucent but not browned. Set aside to cool slightly.
Place the beef, veal, pork, parsley, thyme, chives, eggs, milk, salt & pepper in a large mixing bowl. Put the panko in a food processor fitted with the steel blade and process until the panko is finely ground.
Add the onion mixture & the panko to the meat mixture. With clean hands, gently toss the mixture together, making sure it’s combined but not compacted.
Place a piece of parchment paper on a sheet pan. Pat the meat into a flat rectangle and then press the sides in until it forms a cylinder down the middle of the pan (this will ensure no air pockets). Bake for 40 to 50 minutes, until a thermometer inserted in the middle reads 155 F. to 160 F. Remove from the oven and allow to rest for 10 minutes. Slice and serve hot with the Garlic Sauce.
Combine the oil & garlic in a small saucepan & bring to a boil. Lower the heat & simmer for 10 -15 minutes, until lightly browned. Be careful not to burn the garlic or it will be bitter. Remove the garlic from the oil and set aside.
Combine the chicken stock, butter & cooked garlic in a medium saucepan and bring to a boil. Lower the heat & cook at a full boil for 35 – 40 minutes, until slightly thickened. Mash the garlic with a fork, whisk in 1/2 teaspoon salt and 1/4 teaspoon pepper & taste for seasonings. Spoon the warm sauce over the meatloaf.
Since there are just two of us, I made the full recipe then divided the mixture into 3 portions. I baked all 3 & used one for our supper meal today, froze the second one for a future meal & with the third, I sliced it for ‘meatloaf’ sandwiches. Doesn’t get better than that!