In blender, blend 1/2 cup cilantro, spinach, broth, milk, cumin, chili pepper, and 1/2 tsp salt.
In wide-based saucepan or skillet with lid, heat olive oil over medium-high heat. Add chicken. Sprinkle with remaining 1/2 tsp salt. Cook for 2 to 3 minutes on each side, until browned. Remove to plate. When cool, cut into bite-sized pieces.
Add onion and garlic to pan. Cook for 3 minutes, stirring frequently. Add a little water to prevent sticking if necessary. Add rice and stir for 30 seconds to coat.
Add contents of blender along with reserved chicken. Stir and bring to boil. Cover, reduce heat to low, and cook for 20 minutes. Stir and cook for 5 minutes more if necessary. Remove from heat and leave covered, 10 minutes.
For mint sauce, in blender, blend all ingredients.
To serve, divide chicken and rice among plates and drizzle with mint sauce.
Enjoy!