Swedish Cardamom Meatballs

1/2 cup milk

1 pound ground beef

1 pound ground pork

3 eggs Salt Pepper

1 tablespoon ground cardamom

1 cup yellow onion, chopped, plus

6 cups yellow onions, sliced

1 cup salted butter, divided

1/2 cup sugar Salt and pepper

3 cups beef broth

2 cups heavy cream

3 tablespoons gravy maker seasoning

1 teaspoon nutmeg

1 teaspoon allspice

1 teaspoon MSG

1/4 teaspoon cloves

1/4 teaspoon cinnamon

3 to 4 tablespoons cornstarch

1/4 cup water