Add the garlic and ginger paste and stir in well, then stir in the curry powder. Pour in the pineapple, along with all of the juice. Add the kidney beans, then the tomatoes, and stir well.
The sauce is really easy using two popular spice blends: curry powder and five-spice ... and stock and simmer for 12–15 minutes. Add the pineapple, water chestnuts and peppers.