Preheat oven to 400 degrees. Line a baking sheet with foil, spray with non-stick spray. In a mixing bowl combine bread crumbs, nutmeg, ginger, 1/2 teaspoon salt, 1/2 teaspoon freshly ground black pepper, milk. Toss with a fork, set aside. Cook onion in butter, until tender. Combine bread crumb mixture, onions, egg, parsley and meat. Toss with a fork until well blended. Scoop meat and roll into balls approximately 2 tablespoons and place on prepared baking sheet. Bake meatballs in preheated oven for 18 - 22 minutes or until brown. In the saucepan you cooked the onions, melt the remaining 2 tablespoons of butter. Add flour and cook until bubbly. Whisk in the broth and cream, add espresso powder, salt and pepper to taste. Bring to a simmer, stir until thickened. Add the meatballs to the sauce and simmer for 10 - 15 minutes, stir frequently. Serve meatballs over egg noodles, sprinkle with parsley.