Using a cleaver, cut chicken quarters into 2" pieces. Trim away excess fat and set aside
Combine fish sauce, sugar, chicken bouillon, oil, salt, and pepper in a mixing bowl. Marinade chicken for 30 minutes
Peel and cut carrots and potato into 2" pieces
Peel yellow onion and roughly chop. Finely cut green onions to use as a garnish later
To a big pot on medium-high heat, add a splash of oil. Brown marinated chicken on both sides for 1-2 minutes. Remove the chicken from the pot
Deglaze the pot with a nub of butter, and then sauté onions for 1 minute. Add minced garlic and cook for another minute or until fragrant. Add tomato paste, and continue to cook for another minute
Add chicken back to the pot and mix well, ensuring chicken is fully coated with the tomato paste
Add carrots and potato to the pot. Season with fish sauce, sugar, and chicken bouillon. Add enough water to cover half the ingredients
Bring up to a boil, reduce the heat, and let simmer covered with a slight crack for 20-25 minutes or until chicken is cooked through and veggies are fork tender, then add salt and pepper to taste
Serve with a Vietnamese baguette or over a bowl of white rice. Garnish with green onions, and enjoy!
