Bake for about 30-45 minutes. This depends on the size and amount of the seeds. Do a taste test to make sure that they are done!
Sometimes the pumpkin can absorb too much of the water used in the microwave process. If this happens, remove the pumpkin from the microwave and glass pan, poke some holes in the skin of the pumpkin, set on a cooling rack, and allow the extra water to drip out while it cools off.
Pumpkin puree will usually last in the fridge for about 3-5 days.
You can put leftover pumpkin puree in a plastic container and keep in the freezer! Use it at Christmas time when real pumpkins are usually not available!
To save some time….microwave one half of the pumpkin while you carve the other half OR if you have a large enough microwave and glass dish, put both halves in at the same time (cooking time, of course, will increase).