There are plenty of good substitutes for chicken that are rich in protein, some even complete proteins. Flavor them however you like. Tofu, tempeh, seitan, chickpeas, portabella mushroom, quinoa, lentils, just to name a few. And then there's the actual chicken analogues like Morningstar and Beyond Chicken, which are pretty good and realistic. I am completely satisfied with any of these and some veggies on the side, even without added carbs, although I do love me some carbs too. (Background: have been vegetarian for 15 years.)