ketchup is a popular condiment made primarily from tomatoes, vinegar, sugar, and various spices. It is commonly used to enhance the flavor of foods like fries, burgers, and hot dogs. The thick, red sauce is known for its sweet and tangy taste, making it a favorite in many households. Originally, ketchup was a fermented fish sauce from Southeast Asia. Over time, it evolved into the tomato-based version we know today, especially in the United States. It is often found in squeeze bottles or jars and is a staple in fast-food restaurants and home kitchens alike.