01 -
Melt the butter and warm the olive oil in a big pot. Stir in the chunks of celery and cook for a few minutes until it's starting to soften.
02 -
Mix the garlic and lentils into the pot. Stir everything for a couple of minutes so the lentils are coated with the oil and butter.
03 -
Add the stock and wait for it to come to a gentle bubble. If you're using cheese rinds, throw them in now. Cover it up and let it cook for 20 minutes, or until the lentils start turning soft and mushy.
04 -
Toss in the broccoli (or whatever you've picked) and give it another 5-10 minutes to cook until everything is soft.
05 -
Take the pot off the heat and blend until it's smooth. Use an immersion blender directly in the pot, or transfer to a jug blender—but don't forget to leave room for steam to escape by covering the open vent with a dish towel.
06 -
If the mixture seems too thick, stir in a bit more hot stock until you're happy with it. Mix in the grated cheese and stir until it melts in completely.
07 -
Give it a taste and sprinkle in salt and pepper if it needs it. Serve warm, maybe with some crusty bread.