There may not have been rationing, but we certainly didn't import the number of different fruits/vegetables as we do now. Things like avocados really didn't become popular until the late 70s/early 80s. If you wanted lettuce, it would most likely have been something like round lettuce, possibly Cos. We certainly wouldn't have had all the different varieties and bags of salad that you can buy now. Peppers and aubergines and courgettes (unless you grew those) were considered exotic - and mangetout were a definite 80s arrival/favourite.
I used to work in advertising, in the early 80s, and one of our clients was Buitoni - back in the day when dried spaghetti used to come in long, blue paper packets. Meals like spaghetti bolognese were just becoming popular, although for some families it was a real uphill struggle getting their men folk to accept a meal that wasn't meat and 2 veg. I remember one woman telling me that she made her spaghetti bolognese with a tin of Heinz spaghetti topped with fried mince!
Fresh pasta didn't really come along till the mid/late 80s, and if you wanted Parmesan cheese, you had to buy it dried, in the little drums, that were stocked on the ambient shelves. And it smelt disgusting - amazed that we ever decided that Parmesan was worth buying.
There's a really interesting programme running now on Channel 5 called The 1970s supermarket which looks at a lot of products we were eating then. Some of them were truly awful!