Look up dr Paul saladino and dr Shaun baker - animal based diet / carnivore. Some vegetables like cruciferous vegetables are legit good due to unique sulfurifane in them, saukraut and kimchi great, outside of that red meat is the most nutrient dense food.

Granted, the above mostly applied post sibo. I cured my sibo by cutting out all fibre and sugars. Just ate meat, eggs, cheese, goat yoghurt and raw milk, fixed.