Prepare the Onion Mixture:
Heat the olive oil in a skillet over medium heat. Add the chopped onion and cook, stirring frequently, for about 10-12 minutes until the onion is caramelized and softened. Add the minced garlic in the last minute of cooking and cook until fragrant. Remove from heat and let it cool.

Make the Meatloaf:
Preheat your oven to 350°F (175°C). In a large bowl, combine the ground beef, ground pork, breadcrumbs, milk, egg, French onion soup mix, Worcestershire sauce, salt, and pepper. Add the cooled caramelized onions and garlic to the mixture. Mix everything together until fully combined.

Shape and Bake:
Transfer the meat mixture into a loaf pan and shape it into a loaf. Bake in the preheated oven for 50-60 minutes, or until the meatloaf reaches an internal temperature of 160°F (71°C).

Prepare the Glaze:
While the meatloaf is baking, whisk together the ketchup, Dijon mustard, brown sugar, soy sauce, and Worcestershire sauce in a small bowl. After the meatloaf has been baking for 40 minutes, remove it from the oven and spread the glaze evenly over the top. Return the meatloaf to the oven and bake for an additional 10-15 minutes, until the glaze is set and bubbly.

Serve & Enjoy:
Let the meatloaf rest for 10 minutes before slicing. Serve with your favorite sides such as mashed potatoes or green beans.