Salmon roes, or "fake caviar". There's a whole story about that, involving going to country A to neighbouring country B through country C just to smuggle stuff, while the driver (my then girlfriend) was drunk as a skunk.
It tastes fishy, a bit salty, but I liked it. It pops on your mouth. I'd rather eat deep-fried roes though.
Worth noting that plenty types of roe are edible, not just the ones that can become caviar-like. Some are really good when breaded and deep-fried, although they spill a lot while frying.
I live in the southern parts of Brazil. Salmon itself isn't cheap here, as it's imported from Chile, and AFAIK local fish is not suitable for caviar. (I was travelling to Argentina through Paraguay. Weird route due to booze and smuggling. The caviar was something that she bought on a whim alongside the whisky.)
Also, note that with the equivalent of US$7~8 you can buy a whole kilogram of good quality beef here. So two tablespoons of something for the same price is still, well, expensive as fuck.