For the meatballs, in a bowl beat together the eggs and milk. Add the rest of the meatball ingredients and mix well before moulding into approximately 20 balls.
Cover the meatballs and chill for at least 20 minutes.
Meanwhile for the sauce, heat the olive oil in a large pan and gently fry the onion, celery and garlic until soft. Add the vodka and mix well.
Add the tomato purÃ©e and cook for a few minutes before adding the tomatoes, stock and seasoning.
Bring the sauce up to the boil and then turn the heat down low, cover and simmer for about an hour stirring every now and then. For a smooth sauce blend in a food processor and pass through a sieve.
When ready to cook the meatballs, heat some olive oil in a frying pan over a medium heat and fry the meatballs for about eight minutes.
Add the cooked meatballs to the sauce, stir in the horseradish and cook for four minutes.
To serve, spoon some cooked pasta into each of four deep bowls and top with the meatballs and sauce. Top with grated parmesan.