Bring a pan of water to the boil and add the turmeric and a pinch of salt. Add the cauliflower and cook for 4 minutes. Drain and set aside. Top Tip: Make sure you rinse the sink out straight away with lots of cold water or it may be dyed yellow.
Heat the oil in a large pan. Add the onion and cook for 5 minutes until softened and starting to brown. Add the chilli and cook for 1 minute.
Add the lentils and the sauce. Bring to a low simmer. Add the cauliflower and stir through.
Squeeze over the lime juice and add the coriander. Serve with rice or warmed naan bread.