Step 2) Boil the tomatillos for 5 minutes in a medium saucepan; drain and place in blender. Add jalapeno, cilantro, green onion, garlic and salt; blend until smooth. Heat 1 tablespoon oil in a saucepan over medium-high heat. Pour in the tomatillo salsa and bring to a boil, stirring constantly, for 3 minutes. Add water and bouillon powder; reduce heat to medium and continue to cook at a very low boil for 5 minutes. Stir in chicken and set aside.