Bring a large pot of water to a boil and season with coarse sea salt until it is really salty. It should taste like the ocean. Actually get a spoon and taste the boiling water. (let it cool for a minute so you don’t burn yourself). It’s the only way to know if it’s salty enough.
Add the Brussels sprouts and cook for about 10 minutes until they are barely tender. They should be just cooked through.
Drain them in a colander and quickly transfer to a shallow bowl.