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Red onion jam, also known as onion marmalade, is a rich, sweet, and savory condiment made by slowly cooking red onions with sugar, vinegar, and often spices like thyme or balsamic. This slow caramelization process transforms the sharp bite of the onions into a deep, complex flavor with a jam-like consistency. It is a popular accompaniment in British and modern European cuisine, often served with cheese, meats, and savory pastries.
This condiment is primarily a source of carbohydrates due to the sugar used in its preparation, with negligible fat and protein. It provides a small amount of fiber and antioxidants from the onions, with a typical serving (about 1 tablespoon) containing roughly 30-50 calories.
Culturally, red onion jam is a versatile staple that bridges the gap between sweet and savory, elevating simple dishes like a cheese platter or a burger. Nutritionally, while it is high in sugar, the slow cooking process of the onions can make certain beneficial compounds more bioavailable, and it offers a flavorful way to add depth without excessive fat.