You could char them under the grill, then seal up in a bag or tupperware for 5 mins. When they've cooled down slightly, peel off the skin (should be easy to get off after previous treatment). They will keep for a little while if you cover them with olive oil and bung them in the fridge, and will taste delicious! Great in salads, pasta etc.
Thanks for the recipe, STS. I did it this morning and it worked perfectly. I tasted some and it was gorgeous, but they seemed a bit soggy to put in the oil yet (oil & water don't mix) so I had a brilliant idea. I thought, what with this heatwave, I could do my own sun-dried peppers so I left them on a baking tray in the conservatory. When I came home they were burnt to a crisp! I have put them in oil now, with a garlic clove, and they seem to be perking up again. Can't wait to use them, which is a bit daft because the whole idea was to preserve a glut!