To prepare collards: Cut out the thick center rib from each collard green leaf. Stack the rib-less greens and roll them into a cigar-like shape. Slice over the "cigar" as thinly as possible to make strands.
Heat a large skillet over medium-high heat, then add the olive oil. Once the oil is shimmering, add all of the collard greens and the salt. Don't worry if the greens are overflowing, they cook down!
Stir so all of the greens are lightly coated in oil, then let them cook for 30 seconds before stirring again. Continue stirring every 30-second until the greens are wilted, dark green, and you see some brown on the edges, about 3-6 minutes.
Remove the pan from the heat and immediately divide the cooked collards onto plates and serve