Place the dinner rolls in a large, lightly buttered baking dish, allowing a little space between the rolls. Cover with a dish towel or cloth napkin and set aside in a warm place to rise for at least 2 to 3 hours.
When risen, the rolls should be poufy and soft. Re-melt the butter, and then lightly brush the butter onto the rolls and sprinkle with a little sea salt.
Bake (as instructions on the packet - usually 400 degrees F) for 15 to 20 minutes. Don't be alarmed if you pull them out of the oven and they've risen way over the surface of the pan. Within a minute or two, they'll calm right down.