I use a beef and pork mixture in my Meat Loaf. I also add ketchup, mustard, tomato sauce, chopped onions, and a bunch of stuff I would have to kill you if I told you!
One thing that everyone likes is adding hard boiled eggs to the centre of the loaf. Each slice will have egg in the middle.
I also add a pound of bacon in a weave on top of the loaf.
The guys at our GTG's always ask me to make meatloaf on our trips...
HH
PS... left overs get a grilling on both sides and a couple of slices of Swiss Cheese melted on top.