Vegan chickpea curry jacket potatoes

Name: Vegan chickpea curry jacket potatoes
Prep time: 15 min
Cook time: 45 min
Total time: 1 h
Cuisine: Asian, Indian
Ingredients: 4 sweet potatoes; 1 tbsp coconut oil; 1 ½ tsp cumin seeds; 1 large onion diced; 2 garlic cloves crushed; thumb-sized piece of ginger finely grated; 1 green chilli finely chopped; 1 tsp garam masala; 1 tsp ground coriander; ½ tsp turmeric; 2 tbsp tikka masala paste; 2 x 400g can chopped tomatoes; 2 x 400g can chickpeas drained; lemon wedges and coriander leaves, to serve