Vij's Family's Chicken Curry - Dinner With Julie

Ingredients

• 1/4 cup canola oil (original calls for 1/2 cup—I also like using ghee)
• 1 large onion, finely chopped
• 1 cinnamon stick
• 4-5 garlic cloves, crushed
• 2 Tbsp grated fresh ginger
• 2 large chopped tomatoes (or a similar quantity of diced canned tomatoes)
• 1 tsp salt, plus more to taste
• 1/2 tsp ground black pepper
• 1 Tbsp ground cumin
• 1 Tbsp ground coriander
• 1 Tbsp garam masala
• 1 tsp turmeric
• 1/2 tsp cayenne (or to taste)
• 2-3 lbs chicken thighs, with skin and bone
• 1 cup sour cream (not low fat)
• 1/2 cup chopped cilantro (including stems)