Peel and chop the potatoes into small bite size pieces. Transfer to a baking sheet and drizzle with oil, salt and black pepper. Roast in the preheated 200C oven for about 35 minutes until golden and crispy.
Meanwhile. In a pan heat up olive oil and add chopped red onion and garlic. ADd the spices and fry for about 4-5 minutes until onion is cooked.
Transfer the mixture to a bowl and mix with yoghurt, mayo and lemon juice.
Add roasted potatoes, peas, parsley and red onion to a serving bowl and pour over the sauce. Mix well and serve it. Enjoy!