I've never made mashed potato, too lazy and the Co-op do it too well, but you can certainly buy frozen mashed potato (Aunt Bessie brand) and it microwaves up lovely. Great with salad cream and white pepper.
Hi hardy,
yes you can & yes it's absolutely fine! Make a large batch & use a potato scoop to portion out & 'open' freeze on a tray ( just means putting portions on a tray & freezing them like that ) Once frozen, loosen off tray and either place in a freezer bag or freezer box xxx