You don't need to keep them if you don't want to, but if you do, you can make spiced pumpkin seeds! Here are a few great recipes you can try: Simply Recipes, Roasted Pumpkin Seeds (plain), Healthy Recipes, Spicy Roasted Pumpkin Seeds (for a spicy kick), and Joy Food Sunshine, Roasted Cinnamon Sugar Pumpkin Seeds (a sweet twist).