Preheat your oven to 350°F (180°C).
Make the glaze: In a small bowl combine ketchup, brown sugar, lemon juice, dry mustard. Mix until smooth.
Saute onions in a frying pan on medium-low heat until soft, translucent and sweet. You may wish to add a little bit of salt and sugar to season the onions. Cool.
In a large mixing bowl, combine the ground beef, ground pork, breadcrumbs, sauteed onion, egg, beef bouillion, 2 tbsp. lemon juice, 1/3 cup of the Glaze Mix, salt, and black pepper. Mix until everything is evenly combined.
Transfer the meatloaf mixture to a greased 9x5 inch loaf pan and press down lightly to even it out.
Bake the meatloaf for 60 minutes.
Spoon 1/3 of the glaze mix to the top of the meatloaf.
Bake for another 10-15 minutes or until the internal temperature reaches 160°F (71°C). Pour off the fat.
Let the meatloaf rest for 10 minutes before slicing and serving