I do a bolognese sauce as well with beef, turkey, chicken (sometimes altogether) and tons of veggies (eggplant, zucchini, red peppers, onions, shitake mushrooms, celery, etc) and then puree it a bit so it's smaller chunks of meat. Add some pastina (small pasta) and you have an almost complete meal. My daughter eats this frequently during the week.
I also use chicken or turkey or fish and make little nuggets using panko breading. I know, I know, it's fried food but once or twice a month isn't going to hurt and because I use sunflower oil and no salt, it's not as bad as buying fast food.
Lastly, my daughter will eat meat if it's strongly seasoned with herbs. Think shawarma. It's tiny, shredded pieces of meat with parsley and tzaziki sauce...homemade.