Preheat oven to 350 degrees.
Mix all the ingredients in a large bowl until fully incorporated.
Pack the meat into a loaf pan that has been sprayed with cooking oil, or form into a loaf and place it into an oiled, 9 by 13 baking dish.
Place into the oven for 50 to 60 minutes or until the internal temperature is 160 degrees.
If desired, glaze the meatloaf with 1 or 2 tbsp of ketchup about 10 minutes before the loaf is done.
Remove from the oven and let rest for 15 minutes before cutting to serve.
To make a gravy, reserve any juices from the meatloaf. Add 3 tbsp butter to a skillet on medium, then add 3 tbsp all-purpose flour and whisk together for 1 minute. Slowly add 1 1/2 cups cold beef broth and whisk to prevent lumping. Add any meatloaf juices and stir in. Cook for several minutes to thicken if necessary.