Stir the bread crumbs, 1/4 cup cream, egg, grated onion, garlic, spices, salt, and parsley together.
Let the mixture rest for 3 minutes, then gently mix in the beef and pork. Roll level tablespoons into about 36 one-inch meatballs.
Heat the oil in a 6-quart Dutch oven over medium-high heat and brown the meatballs in two batches for 3 to 4 minutes each, until golden but still pink inside. Set aside on a baking sheet.
Lower the heat to medium, melt the butter, and cook the onion, carrots, and celery for 6 to 7 minutes until soft. Add garlic and cook for 30 seconds, then stir in the flour for 1 to 2 minutes.
Whisk in 1 cup broth, followed by the remaining broth, water, Worcestershire sauce, and Dijon mustard. Bring to a simmer for about 5 minutes.
Add the egg noodles and meatballs and gently simmer over medium-low heat for 8 to 10 minutes, until the noodles are tender and the meatballs reach 160°F (71°C) internally.
Reduce the heat to low, stir in 3/4 cup heavy cream for 2 minutes without boiling, season with salt, and garnish with parsley.