Swedish Meatballs

Ingredients

• 1 pound ground beef
• 1 cup sour cream
• 2 teaspoons Dijon mustard
• freshly ground pepper to taste
• 2 teaspoons salt
• 1 pound ground pork
• 1/4 cup flour
• 1/2 cup dry sherry
• 1/2 cup milk
• 1 tablespoon Lingonberry or cranberry jelly
• 3 cups beef stock
• 6 tablespoons butter
• 2 eggs, beaten
• 1/4 teaspoon allspice
• 3 slices white bread, sides trimmed
• 1 onion, peeled and grated