What to prep:
Cook the lentils in 300ml water over a low heat until soft, checking on them regularly. This usually takes around 15 minutes.
Add more water if needed.
Put the tahini, lemon juice and zest, olive oil, garlic, harissa, paprika, salt and pepper in a food processor and blend.
When the lentils are cooked, add them to the mixture and blend. If it seems thick then add some more water until it looks like hummus.