Bring a large pot of water to a boil. Prepare a large bowl of ice water.
Add the broccoli to the boiling water and cook for 2 ½ to 3 minutes, until bright green and crisp tender, taste testing often (basically, don’t leave the pot!). Right when the broccoli is tender, remove them from the boiling water with a slotted spoon and transfer them to the bowl of ice water.
After 2 minutes, remove the broccoli to a colander to drain. If serving immediately, season with the salt. To freeze, place the florets on a baking sheet in a single layer and freeze for 2 hours, then transfer to a sealed container or freezer-safe bag. Freeze for up to 6 months.