Personally, I think mushy peas are the Devil's work. However, DH does not and asked me to get some at the shop, which did not have any so I got a tin of marrowfat peas instead. Neither of us knows what do with them to make them mushy, apart from go at them with the potato masher but I suspect there may be more to it than that though it probably involved adding some sort of banned chemicals, doesn't it? (can you sense my mushy pea loathing?).