Frittata with Butternut Squash, Caramelized Onions, and Mustard Greens

frittata with butternut squash, caramelized onions, & mustard greens | bloom & nourish


I believe we’ve just turned the corner here in Nashville. It seems like we are finally making our way into the cooler temperature of fall.  I’m so thankful I live in a place that has distinct seasons.  I always get excited when the seasons begin to change, and I start to see different produce in my CSA box. Oh how I’ve missed you butternut squash, dark leafy greens, pumpkin, beets, brussels sprouts, and carrots!

One of the things I received in my CSA box this week was a butternut squash, and I decided on trying it roasted in a frittata.  Did you know butternut squash is actually a fruit, rather than a vegetable because it contains seeds? It’s really a powerhouse of a fruit! It’s full of vitamins A and C, which are helpful in maintaining good vision and a healthy immune system, and boasts loads of antioxidants, specifically carotenoids (think orange and yellow fruits), which can prevent cancer and heart disease.  This squash also contains 15% of your daily value of folate, which pregnant women need for healthy fetal brain development.  The seeds, which are a good source of iron, can be washed and lightly roasted for a delicious snack.

frittata with butternut squash, caramelized onions, & mustard greens | bloom & nourish frittata with butternut squash, caramelized onions, & mustard greens | bloom & nourish

A frittata is very versatile, and a great way to enjoy vegetables from your farmer’s market or CSA, especially ones you aren’t sure what to do with.  I will admit I’ve never had mustard greens, let alone cooked with them.  So, for me this was a good introduction.  Slightly spicier than kale, the mustard greens added a nice kick, nuzzled up against warming butternut squash, and complimented with the sweet, rich flavor of caramelized onions, this frittata is a great way to celebrate fall produce!

frittata with butternut squash, caramelized onions, & mustard greens | bloom & nourish

Frittata with Butternut Squash, Caramelized Onions, and Mustard Greens

1 butternut squash, seeded, peeled, and cubed (or you could use 1 cup any leftover roasted winter squash)
1 tbsp oil (coconut oil and ghee are good options for roasting and sauteing)
1 onion, thinly sliced
2 cups mustard greens, chopped and stems removed
8 eggs
1/3 cup milk (I used coconut milk)
1 tbsp dijon mustard
salt and pepper, to taste

Begin by tossing cubed butternut squash in oil and sprinkle with salt and pepper.  Roast in a 400°F oven for about 30 minutes, or until golden and just tender, tossing half way through.  Set aside 1 cup of roasted squash for the frittata, and save the rest for another meal.

While squash is roasting, heat a cast iron skillet on medium.  Add oil and let it warm.  Toss in sliced onions, and saute until soft. Then add salt, and turn down heat to medium low. Cook until brown and jammy (about 30 minutes), stirring every few minutes, and being careful not to burn.  (If you think about it ahead of time, you can try making a large batch of caramelized onions in a slow cooker, and freezing some for later recipes.)

Meanwhile, in a small bowl whisk eggs, dijon mustard, milk, salt and pepper.  Once the onions are caramelized, add the mustard greens to the skillet and saute just until wilted.  Next, add 1 cup of butternut squash and toss well.  Pour in the egg mixture and let cook on medium-low until almost set.  Finish under the broiler until eggs are set and the top is slightly crisp.  Let cool for 5 minutes, then slice into wedges and serve.

Disclaimer: The material on this blog is based on my own education, research, and personal experience and is not intended as medical or nutritional advice.  Readers are encouraged to conduct their own further research.

6 thoughts on “Frittata with Butternut Squash, Caramelized Onions, and Mustard Greens

  1. genevieve y

    Butternut squash is one of my favourite things about fall! I just made pumpkin purée this morning in preparation for pumpkin pie making tomorrow. If I ever feel like having a frittata (the word ‘frittata’ sounds like a party already- or a kind of party dress, anyway) I’ll be sure to come back to this recipe 🙂

  2. Irina @ wandercrush

    Isn’t it so fun to eat with the seasons? Supermarket convenience is nothing in comparison 🙂 I can’t wait for my first mouthful of butternut squash this fall. Lovely recipe—I bet the sweetness of the squash and onions really make the frittata wonderful.

  3. Pingback: Roasted Potato, Greens, and Goat Cheese Frittata | Bloom & Nourish

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