Trinidadian macaroni pie is a baked dish of macaroni, cheese, eggs, and milk, often served as a side dish.
Cooked macaroni is combined with a seasoned cheese mixture and baked until firm and browned. Evaporated milk, eggs, mustard, and pepper may be used, producing a sliceable casserole rather than a loose stovetop macaroni dish.
Macaroni pie is a familiar part of Trinidad and Tobago home cooking and appears beside meats, vegetables, and other celebratory foods. Its popularity reflects the wider Caribbean adaptation of European-style baked pasta.
The name can cause confusion because Barbados also has a famous macaroni pie. The two are related baked pasta traditions, but this question refers specifically to the Trinidadian preparation, not the Barbadian version.