I photographed this advertisement at Saint Pierre des Corps, the big interchange railway station for Tours where we collect most of our clients, and since then I've seen it on bus shelters and billboards all over - even in Preuilly.
Tours has recently won protected geographical status for one of its local dishes, rillettes de Tours, a type of coarse paté made from shredded pork. The IGP certification means that the food product must be traditionally and (at least partially) processed within a designated geographical area. It looks like the local trade association is having a campaign to encourage people to buy local artisan made rillettes. There are 20 manufacturers of rillettes de Tours allowed to use the certification, so hopefully all of them benefit from this advertising.
The ad is fun for us Tourangelle French learners as it plays on conjugating a (non-existant) verb. Rille is apparently an old French word for a piece of pork, and rillons are bitesized chunks of slow-cooked pork. The joke, or perhaps play on words is a better term, is possible because rillettes and rillons look like plausible verb conjugations for vous (you) and nous (us). Conjugue is also used in the general sense of 'combine' (as for the ingredients in a recipe).
Proper French speakers will no doubt just groan at the silly puns, learners like me will get a little thrill out of thinking they understand the joke and non-French speakers, who only have to access the meaning via my explanation will just go 'well, maybe you had to be there...'