This book is a good start: https://www.amazon.co.uk/Food-Life-Cookbook-bestselling-gut-health/dp/1787335232
Most days revolve around a dish with legumes. I soaked a load of canellini beans yesterday and cooked them up so today we're having this https://www.theguardian.com/food/2024/feb/24/leek-and-beans-romesco-sauce-vegan-recipe-meera-sodha - my DP will have it with bread. Tomorrow we'll have the leftovers on jacket potatoes with a salad.
A couple of days ago I cooked a load of puy lentils, and then made a mushroom and lentil ragu which we had with wholemeal pasta one day and jacket potatoes again another day (had lots of potatoes in our veg box recently). Then yesterday I made a lentil salad - added a jar of roast peppers, some walnuts, some olives to it, when served it up with some figs, cottage cheese, and avocado.
I will have cannellini beans leftover from yesterdays soak, so I will do a chopped salad with tomatoes, lettuce, cucumber, seeds, feta, peppers. Or I might make a bean and tuna salad - mix in a tin of nice tuna and some red onion, maybe some capers.
I soaked butterbeans last week so had a greek butterbean stew, another chopped salad, a ceasar salad using roast butterbeans instead of chicken, and a butterbean mash with some fried fish.
I have a loads of nuts and seeds either in dishes or sprinkled on top. I also make a lot of tahini and greek yoghurt dressings instead of using mayonnaise.
Then also various soups with added beans or lentils - tuscan soup is a particular favourite, or a mexican black bean soup.
We used to eat a lot of sandwiches at lunch as it's quick to do, but I've now found as long as I have some beans or lentils cooked up in the fridge waiting, it's just as quick to throw a salad together and it keeps the hunger away more easily.
I use tins of beans when I haven't had the time to soak and cook myself but cooking them yourself tastes so much nicer. I find the tinned pulses taste a bit tinny. The jars are good but really expensive.