Saute onion in the butter over medium heat until softened, about 5 minutes.
Add garlic and cook for an additional 2 minutes.
Turn heat down to medium low and whisk in milk, Worcestershire, allspice, nutmeg, salt and white pepper and bring to a simmer then remove from heat.
Place bread cubes in a bowl and pour onion mixture over top. Mix well and let cool.
Preheat oven to 400 degrees.
Mix cooled bread-onion mix into beaten egg, ground pork, and ground beef.
Shape into 1 inch meatballs and place on two greased baking sheets, 5 across and 6 rows total.
Bake for 20 minutes, or until cooked through.
Serve topped with gravy, garnished with parsley and with a side of Lingonberry preserves (found at Ikea) and mashed potatoes.