I use to make Borscht. Very affordable. 6 gallons for £6. 6 pounds of beetroot, 3 pounds of onions, 2 pounds of carrots, 1 pound of spinach and a jar of marmite. Blend the lot.
Serve with natural yoghurt or sour cream.
Use to freeze it too. Around the same time, my father was keen on making blackcurrant puree and freezing it too. We weren't very good at labelling anything that went in the freezer. Only found out when we thawed it out.