Preheat oven to 350 degrees F. Combine black pepper, paprika and flour. Coat the chicken with flour mixture. Heat the oil in a 12-in. oven-safe skillet over medium-high heat. Add the chicken and cook until it's well browned on all sides. Remove the chicken from the skillet.
Add the onions and potatoes to the skillet and cook for 5 minutes. Add the carrots, stock, lemon juice and oregano and heat to a boil. Return the chicken to the skillet. Cover the skillet.
Bake for 20 minutes. Uncover the skillet and bake for 15 minutes or until the chicken is cooked through and the vegetables are tender. Sprinkle with the thyme.