Can you be more specific? What sort of stuff do you like?
Vegetarian meals around here are often curries or pasta sauces (tomato, aubergine and feta is a big favourite at the moment. Spinach, ricotta, lemon also goes down well).
Aubergine, mushroom and goats cheese burgers (add a bit of honey) are good.
Risottos are often kid friendly and easy to do vegetarian.
My children generally prefer fairly basic fish recipes - fried cod/haddock with chips/potatoes and veg for example. DS used to love fish pie as a toddler but I can't stand it so we never make it. Do they like prawns? Prawns fried in a bit of garlic butter, very quickly, then a splash of wine wine (a splash, literally) boiled off quickly and mixed with spaghetti, lemon and a bit of parsley is nice.
I do often buy pre-made fish cakes or battered fish fillets to cook in the airfryer.
Mine won't eat mackerel but I've seen lots of children dig into smoked mackerel pate when I take it to BBQs. I make mine very basic with cream cheese, lemon and lots of pepper.