Swedish Meatballs !!!

Swedish Meatballs Ingredients:
Meatballs:
500 g (2lb) beef mince - ideally 20% fat
1 onion - finely chopped
1 clove of garlic - minced
4 tbsp panko breadcrumbs
1 medium egg
5 tbsp (75ml) full-fat milk
salt & pepper
¼ tsp allspice
2 tbsp vegetable or olive oil

Sauce:
3 tbsp unsalted butter
3 tbsp plain - all-purpose flour
1-2 cup beef stock or chicken stock
120 ml (1/2 cup) double (heavy) cream
2 tsp dark soy sauce
1 tsp Worcestershire sauce
1 tsp Dijon mustard
¼ tsp salt