A legend states that after a man tasted a (*) Spartan soup containing pork, vinegar, and salt, mixed with it, he exclaimed "Now I know why the Spartans do not fear death."
This ingredient is stir fried with onion, peppers, and various spices to make rathham poriyal. A Finnish pancake which notably has this ingredient mixed in is known as veriohukainen. Mixing it with noodles and barley is the most common way to make the Korean sundae [soon-day], and cubes made out of it are served in China as a namesake type of tofu. A legend states that after a man tasted a (*) Spartan soup containing pork, vinegar, and salt, mixed with it, he exclaimed "Now I know why the Spartans do not fear death." That soup was known as a black soup, which has a similar name to black pudding, a sausage made using this product. For 10 points identify this substance which is a good source of iron due it containing hemoglobin, which is the typical sustenance of vampires.
This ingredient is stir fried with onion, peppers, and various spices to make rathham poriyal.
blood