Cauliflower & chickpea tikka masala

Name: Cauliflower & chickpea tikka masala
Cuisine: Asian, Indian
Ingredients: 1 medium cauliflower (about 1kg); 2 tbsp vegetable oil; 400g can chickpeas, rinsed and drained; ½ tsp ground turmeric; 1 onion, finely chopped; 2 cloves garlic, finely chopped; 15g fresh root ginger, finely chopped; ½ x 283g jar Patak’s Tikka Masala Spice Paste; 200g fresh tomatoes, finely chopped; 3 tbsp non-dairy yogurt alternative, such as oat; ¼ x 25g pack coriander, leaves only; Steamed basmati rice, to serve