Note: Soaking the whole onions/shallots in freshly boiled water for 5 minutes makes peeling much easier.
You can use streaky bacon instead of lardons
If you want to add more vegetables to your diet, celeriac (add at the beginning), turnip, carrots or parsnips will work well, (add it 30 minutes before the end)
If you only have half a bottle of red wine, you can top it up with a good beef stock.