Aigre doux, pickles and those sort of things rarely hit the mark with a French palate. But if you call it ‘confit’ then more likely to be tasted with an open mind.
A favorite in my family is something called Watermelon Pickle. It’s wonderful with macaroni & cheese, aka macaroni cheese. The other favorite is Spiced Tomato Jelly aka Spiced Tomato Jam. This is also a favorite with mac 'n cheese.
Are you still looking for recipes @Porridge or did you find something by St Mary? I have a recipe book I bought a long time ago that has chutneys and pickles, it’s never let me down.
I can offer you apple (or rhubarb) chutney or apple and tomato chutney recipes if that helps.
The book of preserves, by the women’s institute is quite good, it’s got recipes for a lot of different ways of preserving food, not just pickles and chutneys.
Another one I had, (can’t find now), is River Cottage preserves, I know that’s still available from Amazon.
A photo of the page(s) for these would be very kind. I occasionally see rhubarb on the market here, in season, but apples and tomatoes will be easy to find.
In our first house we had rhubarb, and a quince tree. I miss them! I might try an incursion into Madame’s potager to plant some rhubarb.
Of course there are loads of chutney recipes in my English cookbooks… but not in my French cookbooks.
Checking my French “cuisine plaisir” book, the nearest to “chutney” can be found in the Marmelades section. There’s no vinegar involved, but alcohol/eau-de-vie often appears in a recipe (now there’s a surprise )