Curried Shrimp with Grapes

Combine the onion, garlic, celery, bay leaf, parsley, mustard, apple, butter and ham in a saucepan. Cook for eight minutes, stirring occasionally.

Add the flour, mace and curry powder. Cook for four minutes longer.

Add the broth and simmer for one hour. Strain the mixture into another saucepan, forcing the solids through a sieve.