I am a vegetarian as well but am giving LO meat.
I buy her organic minced beef or lamb as I find it the easiest to cook. I just fry it on a pan. It's great as you can add some onion and garlic too. You can blend it with your normal food or if you are doing BLW just give to your LO as it comes. A simple dish would be minced meat with potato and carrot. Naturally you can use any other vegetables too.
I cook fish in the oven, usually under grill as I can't stand the smell when fish is fried. LO isn't too keen on salmon (the taste is quite strong I believe, well the smell is

), but she'll eat some of it. She really likes cod though. Again I use fresh organic and wild, instead of farmed. I believe you can buy frozen cod but not sure if that's any good???
I haven't actually given her chicken yet (meaning to) as I have thought that red meat has more iron and fat in it (both needed by babies) and fish has essential oils.
I also want LO to get used to veggie dishes with protein (she has a protein rich meal at lunch and more carbohydrates at dinner), so I cook her loads with lentils, chickpeas, butterbeans. Just make sure that you use split lentils (I use red) as they are softer on their tummies. LO's favourite dish is red lentils with sweet potato and butternut squash and cheese.
Overall, I try to get LO to eat a meat dish at least every other day. It's just easier to make her veggie dishes as I can cook for me at the same time...