Onion jam is a delicious condiment made by slow-cooking onions with sugar, vinegar, and spices until they become soft, caramelized, and jam-like in texture. It is a versatile and flavorful addition to both sweet and savory dishes. Onion jam has a sweet and savory taste with a hint of tanginess from the vinegar. Onion jam can be used in a variety of ways, such as a spread for sandwiches, burgers, or cheese boards, a topping for grilled meats or vegetables, or as a flavor enhancer in sauces, dressings, and dips.