Red meats are good too. Just in small amounts.
Alice loves meat. She picks it out from the rest of her meal to eat first. She once had a whale of a time gumming a chicken thigh bone with some shreds of meat left on it! I make sure there's no hard/crispy/gristly bits, and it's cut small enough that she won't choke. We've had the occasional gag (even up to last night), but she's never choked.
Spag bol, chilli con carne, keema curry, meatballs, bits of roasted/grilled meat (tried lamb and pork as well as chicken so far), hamburger. She has also tried sausage, but the salt content is quite high.
I cannot recommend spaghetti bolognese as a meal enough. It's hugely messy, but you can use any sort of meat/meat like protein source you want. The nature of how you cook it means that the mince becomes incredibly soft and easy to eat. Plus you can add so much veg to it to make it even healthier!
Peas are also good for some protein, as well as constipation. Probably better off mashing them still. Alice practices her pincer grip on them. They still mostly escape to the floor, but the occasional one gets picked up and eaten. TMI How do we know they get eaten? They're seen again on the other side.