Combine garlic, chile pepper, cumin, paprika, black pepper, cayenne, and salt in a mortar; grind with a pestle until it forms a paste. Add olive oil and mix dersa well.
Heat a large saucepan over medium heat and stir-fry dersa until fragrant, 2 to 4 minutes. Add potato halves and stir to combine with the dersa. Stir in tomato paste. Pour in enough water to just cover the potatoes and bring to a boil. Reduce heat and simmer until potatoes are tender, about 40 minutes.
Ladle potatoes into a serving bowl. Spoon any remaining sauce over the potatoes.
Cost to cook
4
serves 4 ·
Live supermarket prices, as of 3 Oct. Full-pack shop cost · about £2.37 of it is what this recipe actually uses.