Mild Pea and Sweet Potato Curry

Ingredients

• 2 tablespoons rapeseed oil
• 500 g sweet potato (peeled and cut into large dice)
• 1 red onion (peeled and finely chopped)
• 2 cloves garlic (peeled and crushed)
• 2 cm piece root ginger (peeled and finely chopped)
• 1 tsp ground cumin
• 2 tablespoons mild Korma curry paste
• 1 tin chopped tomatoes
• 200 ml vegetable stock
• 300 g frozen peas
• Juice ½ lemon
• Handful fresh coriander (roughly chopped)
• Sea salt and black pepper