Slow cooker Malaysian nyonya curry

Name: Slow cooker Malaysian nyonya curry
Prep time: 20 min
Cook time: 4 h 15 min
Total time: 4 h 35 min
Cuisine: Asian
Ingredients: 18.40 gm vegetable oil; 8 small skinless chicken thigh cutlets; 1 brown onion, halved, cut into thin wedges; 185g jar Malaysian Nyonya curry paste; 270ml can coconut milk; 127.50 gm chicken stock; 1 stalk lemongrass, trimmed, bruised; 1 cinnamon stick; 1 star anise; 2 makrut lime leaves, torn; 500g desiree potatoes, peeled, halved; 300g cauliflower, cut into florets; 8.00 gm brown sugar; 12.20 gm fish sauce; 4 roti, warmed; 400.00 gm steamed jasmine rice, to serve; Fresh coriander leaves, to serve; Sliced long red chilli, to serve