Cook rice according to directions adding kale, Knorr chicken cubes, chopped kale, and tomato sauce.
Fill dutch oven or large sauce pan with water. Bring the water to a boil. Add the kale, cover, and steam until just tender, 7 to 10 minutes.
Heat olive oil in a large skillet over medium heat; cook and stir onion, until the onion is tender, about 5 minutes. Stir kale and rice into the mixture, breaking the rice into grains with your spoon as you stir; season with salt. Cook and stir until the rice is hot, about 5 minutes.