Fry the onion, garlic and ginger gently in the coconut oil for 3 minutes in a large frying pan.
2 tbsp vegetable oil, 100 g onion, 1 tbsp garlic, 1 tbsp fresh ginger
Add the curry powder, turmeric and garam masala to the pan, stir together and fry for 2 minutes. Add another tsp of oil or a tbsp of water if the mixture is sticking.
5 tbsp medium curry powder, 1 tsp turmeric, 1 tsp garam masala
Add the stock, lemon juice, soy sauce and sugar to the pan.
400 ml vegetable stock, 1 tsp lemon juice, 1 tsp soy sauce, 1 tsp sugar
In a small bowl, mix together the cornflour and water. Add this to the pan and stir together. Simmer for 3 minutes to allow the sauce to thicken.
2 tbsp cornflour, 4 tbsp water
Let the curry sauce cool and when it is safe to do so, add the curry sauce to a blender and blend until smooth (don’t skip this step!). Alternatively you can use a stick blender.
Add the sauce back to the saucepan, along with the diced potatoes, chickpeas and peas and bring to the boil. Simmer for 7 minutes.
400 g waxy potatoes, 240 g tinned chickpeas, 100 g frozen peas
Set the pan aside to allow the mixture to cool to room temperature.