Preheat the container of your pressure cooker on the Sauté function for 2 minutes. Brown the onion in the ghee. Add the garlic, ginger and spices. Cook, stirring, for 2 minutes.
Add the broth and lentils. Season with salt and pepper and mix well. Secure the lid and select the Soup function (or set to High pressure). Set the cooking time to 5 minutes.
When ready, depressurize your pressure cooker manually, then remove the lid. Remove and compost the ginger. Adjust the seasoning. Add broth, if needed, to achieve the desired consistency.
Serve the dahl with basmati rice, yogurt and garnishes.