Since this will be pureed, there is no need to dice or chop finely. Big chunks are just fine, so long as they can cook evenly and will fit in blender or Magic Bullet.
Heat 3 TBSP of butter (or olive oil for vegan option) at medium low (4 on a 10 point electric dial) in a large stock pot. Add 2 yellow onions and a bunch of celery, all chopped. Add salt and pepper. Cook until the onions have sweat and are translucent.
While that’s cooking, chop up 4 large or 6 small apples. I used some Galas and a Pink Lady. Eating apples, not cooking apples because we are not adding any sugar. Crush and peel 3 cloves of garlic. Add the apples and garlic to the stock pot. Add tsp of thyme. Add salt and pepper. Put the lid on a let cook about five minutes.
Meanwhile peel and chunk the celeriac. Add to the crock pot with 1 quart of vegetable broth. Add salt and pepper. Bring heat up to medium. When everything is tender, remove from heat and let cool.
After it’s cooled down, puree with an immersion blender, blender or Magic Bullet. Serve hot with a bit of chopped parsley and toasted pumpkin seeds and, if you’re feeling ambitious, some thinly sliced pear grilled on a hot burner. I accidentally spilled enough pumpkins seeds to two servings in this picture. They were delicious, though.
The soup is a smooth, mildly tart puree with a delicious, rich flavor. There’s a nice bit of bitter heartiness from the celery that is lightened and balanced by the apples, the onions adding some bright notes and of course, celeriac is always delicious.
This makes about 8 servings, but it also tastes better as leftovers. In fact, it’s so much better the next day that I didn’t eat it the day I made it but let it wait overnight. Unlike most celeriac purees, I don’t add any cream so it will keep several days and can also be frozen.