I did try to reduce the impact of what I eat, but I haven't found a replacement for using chicken with a slow cooker. Beef also tastes good, especially when I eat at a restaurant.
I have stopped making hamburgers on my own (and replaced them with fish or soup), but I haven't put more effort into reducing my impact recently.
I mean going vegetarian or vegan by definition reduces your options.
That said, there are lots of delicious slow cooked vegan foods. Despite what the other commenter says, there certainly are flavours & textures available that are not easily accessed on the hob, even eating plant based.