First, carefully cut the top off of the pumpkin.Clean out the inside of the pumpkin. Separate the seeds from the strings and pulp. Rinse seeds in a colander.
Warm water and salt in the microwave. Stir until salt is dissolved. Add the pumpkin seeds and let soak for at one to three hours. The longer they soak the saltier the pumpkin seeds will be. Drain seeds in a colander.
Spread the pumpkin seeds in a single layer on a cookie sheet. Sprinkle sea salt all over the pumpkin seeds and stir to evenly coat. Place the cookie sheet in the oven and bake at 350°F for 20-30 minutes