Heat oil in a large skillet over medium-high heat and add the rice and the onion. Cook, stirring constantly, until rice is lightly browned and onion is soft (watch carefully so as not to burn the rice). Sprinkle rice with garlic salt and ground cumin and stir.
Stir in tomato sauce and chicken broth; bring to a boil, reduce heat to low, cover and simmer for 20-25 minutes. Do Not remove lid until cooking time is finished!