In a heavy pot heat 2 tablespoons of the oil over medium high heat, add the meat in small batches and salt and pepper to taste,saute the meat until it is browned on all sides. Remove the meat to a plate. To the pot add the remaining oil and the onion and cook the onion, stirring occasionally, over medium heat for 5 minutes. Add the garlic, curry powder, coriander, cumin, ginger, and cayenne and cook the mixture over medium low heat, stirring, for 1 minute. Add the flour and cook the mixture, stirring, for 2 minutes. Return the chicken breast to the pot, add the tomatoes and their liquid, chicken broth, raisins, lemon juice and zest, and salt and pepper to taste, bring the liquid to a boil, stirring, and simmer the curry, covered, for 1 1/2 hours. Add the apple and simmer the curry, covered, for 30 minutes more, or until the meat is tender. Serve with rice.