Cook the rice in salted water, then drain and let it cool.
Finely chop the raw chicken breast.
In a large bowl, combine the cooled rice, chopped raw chicken, chopped onion, crushed garlic, parsley, egg, margarine, and all the spices (paprika, black pepper, salt, cinnamon, ground coriander, cumin).
Mix well until the mixture is uniform.

To make the sauce: In a saucepan, sauté the chopped onion and garlic in a little oil. Add the grated or finely diced tomato and tomato paste. Season with the same spices. Pour in 2 cups of water and let simmer for a few minutes. Strain the sauce to get a smoother texture.