We had a (bought) sourdough pizza base w. tomato sauce - which was much, much cheaper than pizzas, even margharitas. I chopped up some left-over ham & chestnut mushrooms; added sliced tomatoes, fresh-picked from the vines in pots outside the kitchen window, and grated a mix of parmesan and cheddar on top. Quite the best pizza I've eaten in years and the whole lot cost less than £3 for 2 of us - used up some lettuce, onion & more fresh-harvested toms in a bit of salad to go with it.
Living where I do I always make sure that we can manage for a week in winter (it was like that in France, too) so I always make at least twice the amount and freeze it. e.g. Bolognese sauce. I've just frozen the first 2 punnets of boiled-down & pureed tomatoes to make a fresh sauce for winter. Then soon there will be sweetcorn to freeze as well.