In English grammar, lasagna and lasagne can both be what kind of nouns?

In English grammar, lasagna and lasagne can both be uncountable nouns. English speakers normally use these words to refer to the food or dish as a mass rather than to individual sheets or portions, so phrases such as “some lasagna” and “a dish of lasagne” are natural.

The spelling reflects different Italian and English-language traditions. In Italian, lasagne is grammatically plural for multiple pasta sheets, while lasagna can refer to a single sheet. The baked dish is commonly called lasagne in northern Italy and lasagna in southern Italy; British English was influenced more by the northern spelling, while American English generally favors lasagna.

That history can make the word look like an ordinary plural, but English usage does not require speakers to treat it as a count noun. Someone can order “two servings of lasagna,” but usually not “two lasagnas” when referring to the food in general. Individual sheets can instead be counted as sheets or pieces of pasta.