Answer:
We now know ketchup as a tomato sauce, but that was not always the case. In the 1700s many people thought tomatoes were dangerous to eat. So, back then, ketchup was not made from tomatoes. Instead, it was more like a fish sauce. It was made vinegar, spices and small fish called anchovies. Later, people made ketchup from mushrooms or nuts, it wasn't until the late 1800's that tomatoes ketchup started to become popular.
Step-by-step explanation:
Tomatoes were considered a poisonous fruit back in the 1700s, since many aristocrats got sick after eating them, sometimes leading to fatal complications. Then, the tomato was called the "poisonous apple." Later they discovered that it was not the tomato the one killing people but the metal from their dishes where they served it.