Yeah I cook a lot of vegetarian food, occasionally it's vegan. I use tofu quite a lot depending on the dish and time as I find you need to press it well and marinate it for a while to be to my taste and texture 😅 (I often use it in curries, sweet and sour dishes)
I do use beans a lot (black beans for enchiladas, fajitas, kidney beans i make refried with for quesadillas, butter beans for stews, cannelleni beans in some dishes, mixed beans for salads)
I also use chickpeas a lot, sometimes Spiced for nibbles, often with flatbread meals, salads too.
Cheese is a big staple, hallumi, feta, very mature cheddar as my toddler likes strong tastes, parmesean I use in my pesto mostly but use to top bolognase or meatball type dishes.
I never use alternatives like fake meats burgers etc. I just make by own vegetables burgers, nuggets. I use to eat them years ago, but I had hyperemesis in my first pregnancy and developed a massive aversion, even now the smell, or whatever it is makes me ugh..its strange didn't know food aversions could be permanent 😂 same with alcohol the smell if i walked in a pub would set me off, but I'm happy that one stayed 😂
We have more vegetarian meals mostly mainly due to budget and my ridiculous fear of not cooking it properly, I end up over cooking due to worrying and then it's ruined. So I often use meat in the slow cooker.
I do fish occasionally for the kids (i want them to like it) I cant stand fish :( nor DH..I think its a side effect of growing up though as it was always avoided by my family.