The 14th-century English layered pasta dish compared with modern lasagna is loseyn.
Loseyn appears in The Forme of Cury, an English cookbook compiled around 1390 for the household of Richard II. Its preparation used sheets of dough layered with ingredients, giving it a structural resemblance to modern lasagna. The comparison is therefore based on both the dish’s method and its name, not on an identical recipe.
Medieval loseyn did not contain tomatoes: Europeans encountered tomatoes only after the Columbian exchange, and tomatoes became part of Italian cooking much later. The older dish belonged to a very different culinary world, where expensive spices, meat, cheese, and rich sauces were central to elite cooking.
The spelling reflects Middle English rather than a modern standardized recipe title, and related transcriptions may vary. It is also important not to treat loseyn as proof that modern lasagna was invented in England. Italian references to lasagna and lasagne are earlier or roughly contemporary, so loseyn is best described as a comparable medieval English dish.