Cut the head of the sunflower off after the disc on the back of it turns a yellow color. Store in a paper bag until the disc turns dark brown, the tell-tale signal that the seeds are ready to be roasted or stored.
Rub your palm across the middle of the sunflower to loosen the seeds. Some may fall out on their own after this step, and some may need to be picked out individually with your fingers.
Rinse the seeds well in a strainer. Set them evenly across a baking sheet.
Bake the seeds in the oven for 10 minutes at 350 degrees Fahrenheit.
Allow the seeds to cool and toss with the preferred amount of salt. Store them in a plastic bag.