Par boil the potatoes in salted water for around 20mins, drain and set aside.
Heat the oven to 200°C (200°C fan). In a roasting tin toss potatoes with olive oil, smoked paprika and salt. Spread on a tray and roast 40-50 minutes until crisp and golden, turning halfway.
Whilst the potatoes are roasting, make the bravas sauce. Heat oil in a pan, add the onions and fry until soften, around 5 minutes.
Add the garlic and stir for 1 minute. Stir in smoked paprika, chilli flakes / hot paprika and tomato purée and combine together.
Add tomatoes, vinegar, sugar and salt. Stir together and simmer for around 10 minutes until thickened.
You can either blend the sauce for a smoother finish, or leave it rustic.
Serve the hot potatoes onto a plate, spoon over the bravas sauce and sprinkle chopped parsley on top