Add the oil to a large lidded pan and heat. Add the onion to the pan and cook on medium until softened.
Stir in the garlic, paprika, thyme, chilli flakes then add the sweet potato/carrots and peppers cooking until the pepper is softened slightly.
Stir in both type of tomatoes, vinegar, and olives then half fill the empty can of tomatoes with water and add that too. Season with salt and pepper.
Bring to a boil then lower to a simmer and cover. Cook for 10 - 15 mins until the sweet potato is fully cooked.
Press the scones halfway into the stew, cover and simmer until the scones are heated through.
Serve scattered with the chopped parsley.