In a food processor add the bread slices and pulse for 30 seconds until the bread crumbles.
Transfer the prepared bread crumbs to a bowl and add the other ingredients; onion, chicken, egg, pepper, salt, nutmeg and allspice powder. Mix it well until everything comes together.
With the help of an ice cream scooper, scoop the meatball mixture and roll it into a ball. Repeat the same with the remaining mixture.
Heat a heavy bottom skillet with oil on a medium flame, add the prepared meatballs and cook it evenly by turning them frequently for 5-6 minutes.
Transfer the meatballs to a plate and discard if there is any moisture/oil. Add butter to the same skillet.
Once the butter is melted, sprinkle the flour and cook for a minute.
Slowly stir in the chicken broth, heavy cream and whisk. Allow the gravy to simmer for 4-5 minutes.
Add the chicken meatballs back to the skillet and cook for 4-5 minutes until the gravy thickens.
Garnish the swedish balls with chopped parsley and serve them over mashed potato and veggies on the side.