Chicken yassa Period BOrigin theory CVerified

Chicken yassa is a Senegalese home dish of chicken marinated at length in lemon and onion, then browned and braised. The tangy marinade tenderizes the chicken while the onions cook down sweet, and a version made with Dijon mustard is widely known as well.

It is generally held to have taken form in the Casamance region of southern Senegal. The dish reflects a land where citrus and onions grow well. A peer-reviewed archaeological study of a settlement in Lower Casamance (PLOS One, 2023) found that in the early twentieth century people there cooked mostly by braising, ate chicken and fish, and raised local vegetables. The time and place where yassa settled in as a regional dish line up with what came out of the ground.

Today's form, generous with onions and citrus, is thought to have spread once colonial trade made those ingredients widely available. From the home kitchen, yassa carried across Senegal and then out across West Africa.

On where yassa comes from and what its name means, researchers differ.

One view holds that it took form as a regional dish of the Jola (Diola) people of the Casamance region of southern Senegal in the early twentieth century. In a land where lemons and onions ripen abundantly, the practice of marinating meat and fish in acid to tenderize them is said to have developed. A multidisciplinary, peer-reviewed archaeological study of a settlement site in Lower Casamance (PLOS One, 2023) unearthed a way of life centered on rice and braised cooking, with chicken, fish, and cattle on the table in the early twentieth century, lending weight to the idea that yassa took root in this place and time.

Another view stresses the colonial-era making of the dish, on both name and ingredients. The name "yassa guinar" (guinar meaning chicken) goes back to Wolof, and this view holds that Wolof culture joined with the ingredients and techniques of the French colonial period (1659 to 1960), the generous onion-and-citrus marinades and the Dijon mustard, to spread the dish's present form. The first view leans on place of origin; the second, on colonial-era supply and cooking style.

The name's own origin has not settled on one answer either. Three readings stand side by side: Wolof yaxa, for cooking with onions; Mandinka yàsso, meaning to grill; and, by way of a Casamance creole, the Portuguese assar, to roast. None has won out. The early work that introduced the dish widely in the English-speaking world was Jessica B. Harris's The Africa Cookbook (1998), and no firm trace has been found earlier than that.