Tofu Tikka Masala

Name: Tofu Tikka Masala
Cuisine: European
Ingredients: 400g / 14.1oz firm tofu; 250g / 8.8oz coconut yoghurt; 1 lemon, juice only; 1/2 tbsp turmeric; 1 tbsp garam masala; 2 tbsp nutritional yeast; big pinch of salt; coconut oil; 1 red onion; 3 garlic cloves; thumb of ginger; 2 tsp cumin seeds; 1 tbsp paprika; 2 tsp garam masala; 1/4 tsp chilli powder; 1kg / 35.2oz passata / tomato sauce; salt; 1 tsp caster sugar; 3 tbsp coconut yoghurt; 1/2 lemon, juice only; handful of coriander; rice for 4 people