Meatloaf is a type of food created by combining, among other things, meat and bread.
The resequenced meatloaf served aboard the Enterprise, according to Travis Mayweather, was something to be avoided. (ENT: "Fortunate Son")
While trying to survive in Shuttlepod 1, Trip Tucker had a meatloaf with gravy and mashed potatoes ration. (ENT: "Shuttlepod One")