Roasted Butternut Squash, Radicchio, and Onion

Here’s a wintery, festive side dish for your holiday table—cubes of butternut squash, along with wedges of radicchio and onion, tossed with salt and olive oil, and roasted in a hot oven until caramelized, then tossed again with toasted pine nuts, balsamic vinegar, parsley, and shredded Parmesan cheese. Wow. My tummy does a happy dance just thinking about making and eating this again. Radicchio is naturally a little bitter, but it loves being grilled or roasted, and it has a special affinity for balsamic vinegar and Parmesan cheese (see our grilled radicchio salad recipe). Combine those ingredients with the sweetness and substance of butternut squash and onions, and now your palate is firing on all levels – sweet, sour, salty, bitter, and umami. Great alongside roast beef or prime rib, or as a vegetarian meal in and of itself.

Roasted Butternut Squash, Radicchio, and Onion Recipe

  • Prep time: 15 minutes
  • Cook time: 45 minutes
  • Yield: Serves 6-8 as a side dish.

Butternut squash can be tricky to cut. Check out our How to Peel and Cut a Butternut Squash for a step-by-step how-to.

Ingredients

  • 1 medium butternut squash (about 2 pounds), peeled and cut into chunks
  • 1 large onion, peeled and cut into wedges through the root
  • 1 head radicchio, cut into wedges through the root
  • Olive oil
  • Salt and black pepper
  • 1/2 cup pine nuts
  • 1/4 cup chopped parsley
  • Grated parmesan or pecorino cheese to taste, about 1/4 cup to 1/3 cup
  • Balsamic vinegar to taste, about a tablespoon

Method

1 Preheat the oven to 400°F. Toss the squash chunks, onion and radicchio wedges in olive oil and salt them well. Arrange in one layer on baking sheets (you may need two) and put in the oven.  Roast the vegetables until their edges are nicely caramelized, turning the radicchio and onion wedges over about halfway through the roasting. The radicchio, onion, and squash will roast at different speeds. So periodically you'll have to remove the finished vegetables and let the others remain in the oven to finish roasting. As a guideline, roast the radicchio for about 25 minutes, turning halfway. Roast the onions about 35 minutes, again, turning halfway. Roast the squash pieces for 45 minutes, but do not turn. In all cases do not remove from the oven until you see browning on the edges.

2 While the vegetables are roasting, toast the pine nuts.  Heat a small pan on medium high heat.  Add the pine nuts in a single layer. Cook until lightly toasted. Remove from heat to a bowl to keep the nuts from burning.

3 Once all the vegetables are cool enough to handle, roughly chop the radicchio and onion into manageable pieces. Place the radicchio, onion, and butternut squash in a large serving bowl. Add the pine nuts and parsley. Add black pepper to taste.  Drizzle with balsamic vinegar. Stir gently to combine, taking care not to squish the soft roasted squash.

To serve, sprinkle with some grated Parmesan or pecorino cheese.

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Links:

Butternut Squash and Arugula Salad with Warm Balsamic Vinaigrette from Taste Food
Squash, radicchio, and mushroom lasagna from Umami Girl
Colorful quinoa with butternut squash, fennel, and radicchio From Honest Cooking

Roasted butternut squash, radicchio, and onion

17 Comments

  1. Julia | JuliasAlbum.com

    I love how colorful side dishes can be this time of the year. I just want to make this recipe purely for its colors! It could serve not only as food but as a tabletop decoration (before it gets eaten). :)

  2. meg

    Yum! This looks absolutely delicious and is beautiful into the bargain. I don’t often have radicchio on hand, but I’ll think twice about that the next time I’m at the grocery store.

  3. Deanne

    This looks wonderful and SO healthy. I just asked my husband to return to the store for radicchio and pine nuts so I can make it tonight.
    Your site has become my ‘go to’ place for recipes. Everything I have made from SR has been delicious. Thanks, Elise for developing a resource for creative cooking.

  4. Julie

    This looks wonderful. I think the bitter radicchio against the sweet butternut and onion is a good combo.

  5. pelin

    i had a head of sugarloaf chicory and half a potimarrron (awesome squash i’ve only seen here in france) languishing away in the fridge so i used this recipe as a jumping-off point. baked the squash and a few red onions a nice long while, tossed it with raw chicory and balsamic/mustard/oo vinaigraitte.toasted some pine nuts and added those in as well. deelish! thanks for being a lifesaver as usual, Elise.

  6. Jayne

    Robust yumminess with minimal effort. My kind of food. I see this method going well with Brussels sprouts or Fennel or sweet potatoes or like a million other things. Thanks!

  7. Katrina @ Warm Vanilla Sugar

    This looks unreal! Love this idea!

  8. Donna

    Made this as my contribution for a dinner party the first day it was posted….It was a big hit. I added some minced, fresh rosemary. Delicious!

  9. fabiola

    I love the serving dish so much, it is beautiful! I am also a fan of this salad. I have been roasting my butternut squash all season. Putting it in soups, quoinoa, and such. But have not done a salad, which is great. Plus I love love radicchio.

  10. JoanneNicole

    This looks absolutely delicious (as all your recipes do!) but I wanted to comment because I have that exact same serving dish! Mine was a hand-me-down from my mom, that was probably a garage sale or thrift store find for her…so mine is a bit more tarnished than yours. I always use it for serving Halloween goodies in, because I think that with it’s tarnished look, it has a bit of spooky elegance to it. Anyways, just wanted to share!

    • Elise

      Cool! I inherited that dish from my grandmother, who had several odd pieces in silver plate. I love the tarnished look.

  11. Alex

    Just made this tonight, and it was SO good! I loved the combo of pine nuts and cheese (I used pecorino romano) with the butternut squash- it felt unexpected, but worked so well together! I especially like it because any time I cook with pine nuts, it reminds me of my Italian grandmother, who passed away a few years ago. Thanks so much for a delicious recipe!

  12. Annette

    This fabulous combination tastes just as good as it looks. The sweet, buttery squash melts in your mouth and the onions, radicchioc balsamic vinegar and pine nuts add the most wonderful flavors to the mix. Easy to put together and very few ingredients.

  13. Jen

    This recipe looked so amazing that I used it to try butternut squash for the first time. It did not disappoint. Flavors and colors were stunning and worth the effort. I think the caramelized onions made this dish extra special, but the delicately browned squash, toasted pine nuts, and robust vinegar were equally delightful to the palate. This was also my first time cooking with radicchio, and I have to say that it brought a depth to the dish that I hadn’t expected. I’m vegan, and so left out the parmigiano, but even so, all the flavors were beautifully complimentary, and I will be making this for years to come, I know. An impressive dish. Thank you.

  14. Sarah Y.

    This looks really beautiful! I’ll have to try it (cooking w/raddicchio for the first time). Thanks for posting this recipe.

  15. Sherry in Union, KY

    This turned out to be the perfect Fall side dish. Thank you for the recipe!

  16. Julia

    Another great one – what great flavors! This is delicious and easy and looks really impressive! Thanks, Elise.

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