Now for the main cooking – Heat a large, deep frying pan over medium heat and add one tablespoon sunflower oil. Sauté chicken till nearly done (about 2 minutes). Set aside on a plate. In the same pan, add onions and garlic and sauté will soft, about 3-4 minutes (add more oil if needed). Add rice and coat with all ingredients and cook about 3 minutes, constantly stirring. Make sure everything is well coated, add a bit more oil if needed. Add tomatoes, salt and pepper. Add warm broth (a cup at a time) and cook for 10-15 minutes, uncovered and stirring constantly on simmer. At this point, rice should be just about done.