Where did lasagna originate?

Lasagne, singular lasagna, are a type of wide, flat pasta, possibly one of the oldest types of pasta.

Lasagne, or the singular lasagna, is an Italian dish made of stacked layers of thin flat pasta alternating with fillings such as ragù (ground meats and tomato sauce) and other vegetables, cheese (which may include ricotta and parmesan), and seasonings and spices such as garlic, oregano and basil. The dish may be topped with melted grated mozzarella cheese. Typically, the cooked pasta is assembled with the other ingredients and then baked in an oven. The resulting lasagne casserole is cut into single-serving square portions.

As with most other types of pasta, the Italian word is a plural form: lasagne meaning more than one sheet of lasagna, though in many other languages a derivative of the singular word lasagna is used for the popular baked pasta dish. Regional usage in Italy, when referring to the baked dish, favours the plural form lasagne in the north of the country and the singular lasagna in the south. The former, plural usage has influenced the usual spelling found in British English, while the southern Italian, singular usage has influenced the spelling often used in American English.