It is probably food truck or nothing. Is it any different to having burger or kebab vans? (OK, I know no one on GN would dream of using a burger or kebab van), but what about food vans at fairs and outdoor events?
During COVID, a local mobile wood-baked pizza company whose business was high-end private events (weddings, special openings etc) kept going by touring local villages, one an evening, and selling from their van, you order your pizza in advance and it is just coming out of the oven as you arrive to collect, no worry about food safety, apart from food hygiene ratings, a pizza that has just spent 15 minutes in a very hot oven, is not going to harbour bacteria, at least only dead and well baked bacteria.
Business is obviously not good at the moment so in the last few weeks they have reappeared at their pitch in the village hall car park so, for us, Friday night is now pizza night.