1. Wash the rice and soak it in water for 30 minutes.
2. In a deep pan, heat a tablespoon of oil and brown the almonds, pistachios, and pine nuts. Set aside.
3. In the same pan, over high heat, grill the chicken breasts for 5 minutes on each side until they have a nice golden color. Remove from heat.
4. Boil 2.5 cups of water and add a peeled and quartered onion, cinnamon stick, bay leaves, and a tablespoon of salt.
5. Once the water is boiling, add the chicken breasts and simmer over low heat for 20 minutes.
6. Remove and shred the chicken. Strain the broth into a large bowl.
7. In the same pan, heat another tablespoon of oil and sauté the second minced onion. Add the ground beef and cook for 5 minutes. Season.
8. Add the rice and chicken broth. Bring to a boil, then reduce the heat and cook the rice for 15 minutes.
9. In a shallow bowl, place a generous amount of rice, shredded chicken, and some pre-cooked nuts.