Cheesy butternut squash and spinach stuffed shells

Gorgeous stuffed shells! Conchiglioni are stuffed with a yummy vegetarian filling, nestled in cheesy sauce & topped with cheese before baking to perfection.

The best laid plans…

I’d better come clean – this was supposed to be a lasagne. But when I went to the cupboard to get the lasagne sheets, there were only about 3 in the box. A quick rethink, a look at what we did have – conchiglioni! – and the ingredients were repurposed into these delicious stuffed shells instead.

Stuffed food

I first made stuffed shells for Succot, when stuffed foods are the order of the day, but these are just as good at any time of year. This dish also has the advantage of reheating really well if you make it in advance. Ideal shabbat food, or just great if you need to make-ahead for a quick and easy dinner.

The butternut squash and spinach filling is really tasty as well as being highly nutritious and packed with vegetables. But it’s the gooey cheese sauce and crispy cheesy topping that really makes these stuffed shells special. My daughter Kipper wanted seconds – but only of the “crispy bits”!

Giant shells

Giant pasta shells or ‘conchiglioni’ are becoming more readily available in the UK. Time was when you’d have to visit an Italian deli or other specialist shop, but these days you’re quite likely to find them in the supermarket. They are usually either with the ‘ordinary’ pasta, or sometimes in the specialist foods section. Ocado even has a choice of two different kinds!


Of course you could make this as a lasagne instead – just layer up the squash mixture, the cheese sauce and the pasta sheets in the usual way, and put plenty of grated cheese on the top. You can let me know how my original idea came out! I think in retrospect I prefer the stuffed shells version…

These gorgeous stuffed shells are conchiglioni filled with a delicious vegetarian squash & spinach mixture, nestled in a cheesy sauce & topped with more cheese before baking to crispy perfection.

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cheesy butternut and spinach stuffed shells
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5 from 4 votes

Cheesy butternut squash and spinach stuffed shells

Giant pasta shells are stuffed with a tasty squash and spinach filling then baked on a bed of cheesy sauce. More melty cheese on top makes them extra-special!
Course Appetizer, Main Course
Cuisine European, Italian
Servings 4
Author Helen


For the shells and filling

  • 1 small butternut squash (approx 800g)
  • 2 medium onions
  • 2 tbsp butter or oil
  • 200 g washed spinach
  • 75 g cream cheese (1/3 cup)
  • 1/2 tsp ground nutmeg
  • Good pinch cinnamon
  • Salt and pepper to taste
  • 200 g giant pasta shells (conchiglioni)

For the cheese sauce & topping

  • 1 tbsp butter
  • 1 tbsp flour
  • 400 ml milk (1 3/4 cups)
  • 100 g grated cheese (1 cup)


  • Peel the butternut squash and remove the seeds. Coarsely grate the flesh - I use the food processor which makes it fast and easy! Set aside.
  • Peel and chop the onions. Heat the butter/oil over a medium heat in a large skillet, and add the chopped onions. Fry for 3-5 minutes until starting to soften.
  • Add the grated squash to the pan and stir well. Cook, stirring occasionally, for about 5 minutes, until the squash is softened.
  • Remove any tough stalks from the spinach if necessary, then shred the leaves and add to the pan. Cover and allow to wilt for a few minutes before stirring into the squash mixture.
  • Stir in the cream cheese, nutmeg and cinnamon. Taste and adjust the seasoning and add salt and pepper to taste. Remove from the heat.
  • Cook the conchiglioni in boiling water for 8 minutes. Drain well and rinse in cold water. (Make sure the shells are well drained as they can hold quite a bit of water inside.)

To make the cheese sauce

  • Melt the butter in a heavy-based saucepan over a medium heat. Add the flour and stir well in. Cook, stirring, for about a minute. Remove from the heat.
  • Add the milk a little at a time, beating well after each addition, until all the milk is added and the liquid is smooth and not lumpy.
  • Return to the heat and cook, stirring constantly, until the sauce comes to a boil and thickens. Remove from the heat and stir in about half of the cheese.

To assemble and finish the dish

  • Preheat the oven to 180C (350F).
  • Add about 50-75ml (roughly 1/4 cup) of the cheese sauce to the butternut squash filling and mix well. Pour the remaining sauce into the bottom of a large baking dish and spread into an even layer.
  • Stuff a generous tablespoon of filling into each pasta shell and arrange on top of the sauce in the baking dish.
  • When all the shells are filled and in the dish, sprinkle the reserved cheese over the top.
  • Bake for 30-45 minutes, until cooked right through, golden and crispy on top, and bubbling around the edges. If the dish seems to be browning too quickly, cover it loosely with foil for the remainder of the cooking time.


Depending on the exact size of your butternut squash, you may have a little filling left over. Spoon it into a dish, top with grated cheese, and bake! Delicious!

If you have giant pasta shells left over, you might also like to try these Pinto bolognese stuffed shells from The Veg Space.

Other delicious baked pasta dishes include broccoli, tomato and salmon pasta bake, cheesy parsnip pasta bake and veggie sausage and pepper pasta bake.

I’m linking this recipe up with CookBlogShare, hosted by Easy Peasy Foodie.


  1. This sounds delicious but how do u make it ahead of time?

    • Hi Ronna. To make this in advance, simply prepare it and assemble it right up until sprinkling cheese on top. Then cool and chill until required. At that point you can heat it up in a 180C (350F) oven but it will need about an hour – make sure it is heated right through before serving. I hope this helps! Helen x.

  2. What kind of cheese do you recommend for shredding?

    • Hi Lynn, I would usually use cheddar or a similar hard cheese. If you want it to be gooey and stretchy, you can also add some mozzarella. Enjoy!

  3. 5 stars
    I really like this recipe, the flavour combination is delicious and healthy – comfort food at its best:) #CookBlogShare

  4. I’ve been looking for variety with my butternut squah, getting tired of the same old squash kugel. Thanks!

    • Thanks Miriam! Although I’m ashamed to admit that I’ve never thought to make a kugel out of squash – d’oh! You can guess what we’ll be having sometime soon though…. 🙂

  5. This sounds delicious…and just the sort of thing that would happen to me! I have had quite a few ‘happy accidents’ where I’ve started making one thing and discovered I am missing a crucial ingredient (I’ll always remember the time I was making a recipe from Hugh FW’s ‘3 good things and forgot one of the 3 things!), but then I end up making something even nicer!! I think I am at my most creative in the kitchen under that kind of stress. Thanks for linking up with #CookBlogShare 😀 Eb x

  6. Jemma @ Celery and Cupcakes

    You can’t beat a good pasta bake. Really delicious comfort food!

  7. 5 stars
    This is all my favourite things combined in one dish! I will definitely be making this!

  8. Helen @ Fuss Free Flavours

    5 stars
    that looks like perfect cold June weather comfort food!

  9. 5 stars
    Oh yum, what a lovely filling for the giant shells, my favourite kind of comfort food! Thanks for linking to my stuffed shells too.

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