Although I am not plant based, I have experimented for years, like so many on what works for me.
The following may help. If possible remove rice, pasta and potatoes. In place courgettes,, leeks, tomatoes, radish, cauliflour, celeriac, mushrooms, bean sprouts, green beans, cabbage, greens, kale, spinach, bell peppers and sugar snaps avocados. Nuts apart from cashews and peanuts (maybe Asda brand is ok as these are circa 5 g per 100 g). I would suggest small amounts of carrots and butternut squashes / turnips / swedes (these last 5 items are higher carb, but better than potatoes. I choose to eat beetroot as well.
If you do eat eggs and cheese, there's some baseline foods along with fruit ending in berry.