what i do is de-stork them place them on one of your freezer trays loosely but not touching each other, one they have frozen you can place them in an air tight container (sandwich box or something) then put them back into the freezer, using this method the seeds may go brown but that doesn't take away the taste. I also de-seed them and chop them up, place the chopped chillies in a ice cube tray with a little water, once frozen put them in a air tight container. Then you have ready to use blocks of chillies. If you decide to use freezer bags instead of containers make sure you double bag them. hope this helps