Mix together the beef mince, breadcrumbs, egg, salt, pepper, garlic and onion and roll into walnut sized balls.
Brown in a little oil then remove from the pan and add the bacon. Cook until crisp then add the butter and heat until foaming. Stir in the flour.
Add the beer in stages, stirring all the while to avoid lumps, to make a smooth sauce. Reduce for a further 5 minutes.
Pour in the cream and salt then stir, add the meatballs and cook for a for a further 4 minutes until cooked through. Add the cheese and stir until everything is incorporated and you have a smooth sauce.