Step 1

Place the split peas, onion, tomatoes, ginger, ground cumin, turmeric, crushed garlic, curry leaves and stock into a slow cooker. Add most of the chilli and stir to combine. Cook on high for four hours, until the split peas are tender.

Step 2

Season the dal generously with salt and freshly ground black pepper. Just before serving, heat the oil in a saucepan. When the oil is very hot, add the whole cumin seeds and the sliced garlic. Fry until the garlic is golden-brown and the cumin smells toasty and almost smoky. Spoon the hot spiced oil over the dhal, scatter with the remaining green chilli, then serve with lemon wedges for squeezing.