Regarding diet.
You will find many lists form internet searches of what you must or mustn't eat but treat them all as advice rather than law. We are all different and respond to foods differently. This is due to our unique gut biome and learned responses from our environment, habits and the foods we ate as we grew up.
Keep a food diary to discover your own particular trigger foods.
Whereas the suggested harmful foods may be common triggers for some, there are also many propagated myths. Research published this week shows tea and coffee are not harmful despite them figuring high o "banned" lists. Another recently showed a similar finding for alcohol. The suggestion is that these drugs relax the lower oesophageal sphincter exacerbating reflux but the researchers found otherwise.
Another popular myth is spicy food. We may imagine it's harmful as it can make the back of the throat feel hot. And if we have any oesophagitis, it can irritate as it passes over it, like pouring salt on a wound, but if spicy foods were bad, the highest incidences of Barrett's and oesophageal cancer would be found in the Indian subcontinent.
Acidity and alkalinity of fodd is also another myth. (Google Alkaline Diet myth). The stomach produces highly concentrate hydrochloric acid as required. If you were to spill some on your hand it would cause permanent scarring (and it can do the same to your oesophagus). If you were to pour lemon juic on your hand, it would just feel wet.
Alkalines neutralise acid but the alkalinity of the most alkaline foods is insufficient even in vast quantity, it's no better than pouring a kettle of hot water in the ocean.
Even one of the top American ENT doctors who gave the names "silent reflux" and "LPR" to what is correctly termed extra-oesophageal reflux, has been seduced by this myth and recommended alkaline water which was an invention of botted water comanies to make a profit. (Again, you can Google Alkaline water myth. )
The only consistent items on banned food lists are those high in animal fats like processed meats. They do not break down in stomach acid and remain longer being churned and sprayed with more acd. Eventually some bile may be allowed to enter. Acting like detergent, it allows the stomach acids to attach to the animal fats. If acid and bile reflux together, the combination can start dissolving the structure of the oesophagus causing permannet damage - Barrett's oesophagus.
However, if you want a book of recipes that others have found helpful, go to the sales page of Barrett's Wessex website and scroll down to the picture of the Cool Food cookbook. Clicking on that will permit a free pdf download - but no guarantees the recipes will all work for you.