for *big* savings in veggies - plant a garden!
Nothing more to say.
Imagine that - from ole joyful.
Except - for city residents - maybe there's a community garden in your area. There are several in our city.
Ask around - you should be able to find whether there are ones available in your area.
Bonus: maintaining it provides good exercise.
It does tend to make you hungry, though.
Hint: Many novice gardeners tend to plant way too many seeds - so have surplus produce.
Share with neighbours (if they're not so suspicious of your generosity that they run you out of town) or a local food bank.
Happy gardening, all!