I feel like blood as ingredient is quite hardcore and sth lot of plp wouldn't want to try out, but there is some popular dishes in my country that are made with blood. Blood sausage and blood pancakes being the most common. I have tried those out, but I kinda don't like the taste at all blood is such strong and odd taste, very metallic. And i guess the idea is bit weird for me, but I don't eat organ meats either like liver etc. 