Preheat oven to 350 degrees Fahrenheit.
In a large casserole dish, add canned tomatoes with juices, chicken broth, tomato paste, uncooked rice, spinach, spices & sugar. Mix well.
Season 3-4 boneless skinless chicken breasts and place on top of the tomato rice mixture; lightly press the chicken into the mixture.
Cover with a lid or tin foil and cook in the oven for 1 hour and 15 minutes. Test the rice, and if it is still crunchy, place back in the oven for 15 more minutes.
Remove casserole from oven and sprinkle grated cheese on top of chicken breasts and rice.
Place back in oven for 5 minutes to allow cheese to melt.