We eat mostly vegetarian although I do eat some fish occasionally and DH eats meat but for home cooking we tend to stick to veggie.
Last night we had veggie fajitas - fried peppers, onions and whatever veggies you have (last night I added grated carrot and baby corn that needed using) with garlic, chilli flakes, paprika and other random seasoning I just sort of freestyle, but you can buy fajita seasoning or dinner kits. Add tin of kidney beans (or black beans or cooked rice or whatever you fancy really) and serve in wraps with some salsa, sour cream and grated cheese. We had some guacamole so used that too.
Falafel - there’s recipes on line but we’re lazy and get the gosh or cauldron ones. We have them warm on flat breads with hummus (I do sometimes make my own - tin of chickpeas, lemon juice, garlic, tsp tahini paste, olive oil, bit of ground cumin and paprika, blitzed in blender) with salad.
Griddled halloumi with salad or served on burger buns with whatever burger accompaniments you like, or served in pitta/flatbreads with above mentioned hummus. Or with tsatsiki.
Really lazy one - roast veg (sometimes I even get the packet of pre prepared veg 
). Stir through pasta with a jar of sauce - I love the lloyd grossman tomato and chilli one.
Or roast a load of your favourite veg with garlic, herbs and some balsamic vinegar. Add cherry tomatoes for the last ten mins of roasting time. Stir through cooked pasta and crumble in some feta cheese.
Risottos - take time but not difficult. Soften garlic and onion, add your arborio rice for a few mins, whatever veggies you are using and use veggie stock or a combination of veg stock and wine. It’s nice with frozen peas and mint, or you can use peppers or whatever veg really. I sometimes stir a bit of quark or Philadelphia through for creaminess, or actual cream or creme fraiche - whatever we have in.
Veggie chilli - loads of different recipes, I like to do it with chunks of butternut squash and sweet potato. Sometimes do it as a normal chilli but use quorn mince, DH prefers the quorn, I like it with the veggies.
Spanish omelette / frittatas. This is nice www.bbcgoodfood.com/recipe/pea-feta-summer-herb-frittata
There’s a million different veggie curries and dahls out there too. We tried this one recently and it was lovely www.bbcgoodfood.com/recipes/coconut-squash-dhansak
Not a proper recipe but I sometimes like to use chopped paneer and assorted veg - e.g. onions, red peppers, mushrooms etc and marinade them a bit in one of those pataks paste pots (I bought loads when they were on offer for £1 for two pots) and then fry it all on a griddle pan. I keep a spoonful of the paste back which I stir through Greek yoghurt as a kind of dressing, or you could make a raita or some mint yoghurt. Serve with rice.
This is one of our all time favourites- thehappyfoodie.co.uk/recipes/vegetable-and-lentil-cottage-pie
I’ve made that for non veggies too and they’ve really liked it.
This is surprisingly lovely - I like it best with cauldron sausages, the Lincolnshire style ones - realfood.tesco.com/recipes/carls-all-change-casserole.html