Different recipes call for rice, onions, currants, and pine nuts, and it's often eaten around a piece of lettuce, cabbage, or vine leaves. Veggies can be thrown in as well, like peppers, zucchini, tomatoes or eggplants.
Kısır is a very similar dish to Tabbouleh salad. It's a bulgur-based salad made with tomato paste, finely diced tomatoes, parsely and garlic.