Chicken Kurma (Traditional Chicken Curry)

Heat oil in a large saucepan over medium heat. Add onion and cook, stirring occasionally, until soft, 2 to 3 minutes. Add tomatoes, garlic, ginger, serrano, tomato paste, turmeric, salt and pepper. Bring to a simmer. Reduce heat to maintain a simmer, cover and cook for 10 minutes.

Add chicken and increase heat to maintain a lively simmer. Cook, stirring occasionally, until the chicken is almost cooked through, about 5 minutes. Add bell peppers and lemon (or lime) juice and cook, stirring occasionally, until the chicken is just cooked through, 5 to 10 minutes more. Garnish with cilantro and/or mint, if desired.