I didn’t eat meat for years, do again now, but these were some of the meals we had very often/ these or some version of them. I can’t eat lentils or chickpeas anymore but they were delicious whilst I could!
https://thehappyfoodie.co.uk/recipes/vegetable-and-lentil-cottage-pie/
Quesadillas with cheese, some kind of veg and some kind of bean in eg https://www.hellofresh.co.uk/recipes/cheesy-sweet-potato-quesadillas-63f500e6b6ae9e66039dd74b
Chilli - https://georgieeats.co.uk/mixed-bean-veggie-chilli/
Falafel with flatbreads, some kind of dip/ sauce - usually made a garlicky/ herby yoghurt type. Used shop bought falafel I liked the cauldron ones. Serve with salad and/ or chips.
Ones we still have a fair bit are -
Creamy leek pasta - finely slice leeks, soften them in mix of butter and oil with some garlic, meanwhile cook pasta and every so often splash some of the pasta water in with the leeks to help them soften. By the time the pasta is cooked hopefully the leeks will be really soft. Take off the heat and add a little cream, or cream cheese works too. Combine with the pasta and bit more of the pasta water, and you can add Parmesan/ vegetarian alternative and lots of black pepper.
Roast selection of veg - peppers, red onion, sweet potato and butternut squash work well but whatever you want to use, with garlic, oil and some balsamic vinegar. Add cherry tomatoes for the last 10/15 mins or so. When all roasted combine with cooked pasta and crumble over feta cheese.
If you’re ok with fake meat sometimes, this is nice - I prefer it with cauldron sausages and I put extra in usually - https://www.tesco.com/shop/en-GB/buylists/food-love-stories/carls_all-change-casserole?srsltid=AfmBOoqA0T7LY1qf8zclzE2vRxr-jQyb8lyhHXlgYpzN5ECZjONwneqh
Soups with crusty bread, or cheese on toast alongside if you prefer. Lentils are good for bulking out, since I can’t have them I add bulgur wheat to chunky/ thick veg soups. Or another one I really like is roasted red pepper and tomato, no real protein to speak of in that one though but it is tasty and ok for the odd meal!
I do fajitas with halloumi sometimes, or paneer curries - actually once used feta when I couldn’t get paneer in a curry and DH preferred it.
Also do a vegetable stir fry and noodles with peanuts or make a peanut sauce.
Plus lots of omelettes/ frittatas, good old beans on toast or in jacket potato, mac and cheese with hidden veg if I can get away with it.