Bulgarian Chicken with Rice (Пиле с ориз)

Ingredients

• chicken thighs
• white Basmati rice
• yellow onion, chopped
• large carrot, cut in 3-4 large pieces
• celery stalk, cut in 3-4 large pieces
• mushrooms, chopped
• water
• teaspoon dried spearmint , ground
• teaspoons kosher salt
• black pepper
• green onion, chopped green and light green parts