Substitute Grana Padano cheese for Parmesan if desired. You can cube butternut squash a food processor with the pommes frites (french fry) cutter and then just pulse it one or two times with a regular blade.

Recipe Summary

prep:
20 mins
cook:
50 mins
total:
1 hr 10 mins
Servings:
4
Yield:
4 servings
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Ingredients

4
Original recipe yields 4 servings
The ingredient list now reflects the servings specified
Ingredient Checklist

Directions

Instructions Checklist
  • Preheat oven to 425 degrees F (220 degrees C). Grease a 9x13-inch casserole dish.

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  • Heat olive oil in a skillet over medium heat; cook and stir onions in the hot oil until softened, about 10 minutes. Stir in squash and garlic; season with salt. Cook squash mixture, stirring occasionally, until squash is slightly tender, about 10 minutes. Add water if mixture gets too dry. Transfer squash mixture to the prepared casserole dish.

  • Lightly whisk eggs in a bowl; stir in sour cream, Parmesan cheese, basil, and black pepper. Pour egg mixture over squash mixture; top with mozzarella cheese.

  • Bake in the preheated oven until squash is tender and mozzarella cheese is bubbling, about 30 minutes.

Nutrition Facts

512 calories; protein 24.2g 48% DV; carbohydrates 41.8g 14% DV; fat 30.1g 46% DV; cholesterol 194mg 65% DV; sodium 713.8mg 29% DV. Full Nutrition

Reviews (69)

Read More Reviews

Most helpful positive review

Rating: 4 stars
12/13/2012
This is a very delicious way to cook butternut squash! Next time I think I will cook it at 375 or take it out of the oven sooner. Since I love nutmeg, I might add just a bit. :) Read More
(25)

Most helpful critical review

Rating: 3 stars
08/11/2014
definitely had a quiche texture was not expecting that. Added extra salt as well Read More
(2)
88 Ratings
  • 5 star values: 49
  • 4 star values: 27
  • 3 star values: 6
  • 2 star values: 4
  • 1 star values: 2
Rating: 4 stars
12/13/2012
This is a very delicious way to cook butternut squash! Next time I think I will cook it at 375 or take it out of the oven sooner. Since I love nutmeg, I might add just a bit. :) Read More
(25)
Rating: 5 stars
03/31/2014
This was the first time my family and I had eaten butternut squash and it was great! Kids and husband loved it! I was out of sour cream, so I used about a half a cup of goat cheese, and instead of the fresh basil, I just sprinkled some dried basil in. To make it easier to peel the squash, I put it in the oven on Broil for 5 minutes. It softened the skin so that it peeled easily and was easier to cut without cooking the squash. Read More
(23)
Rating: 4 stars
10/19/2012
Never cooked or eaten butternut squash before. This was wonderful. Took a little longer than I thought to peel and cook squash though. If a person doesn't have "experience" with this type of squash they might want to take a little extra time for prep. Read More
(16)
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Rating: 5 stars
02/25/2013
I thought this was a really creative way to use butternut squash. It was tasty. I added cubed chicken to make it a full meal. I cut the squash length wise and roasted it for 50 minutes at 400 degrees which made it much easier to handle. Read More
(13)
Rating: 5 stars
10/07/2015
This turned out great! I cut the squash in half and microwaved for 5 minutes so it could be peeled easily. Then putting this recipe together was a breeze. Everyone loved it for supper and we had it warmed up for breakfast! Will definitely make this again! Read More
(7)
Rating: 5 stars
10/24/2013
Very tasty meal. We had this with brown rice and a vinegary cole slaw salad. I made a few changes: I added beans to the squash and onions. I used cheddar instead of Parmesan. And I mixed the mozzarella with some ground flax seeds. My family requested that the next time I make this I have a bigger cheesy layer. So I'll probably just double that part of the recipe. Read More
(7)
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Rating: 5 stars
12/03/2012
Fantastic!! I used feta cheese on top instead (used parmesan inside) and only had to use a 7x11 pyrex dish. Read More
(5)
Rating: 4 stars
10/30/2012
Just made this recipe...I didn't have any mozzarella so I used other shredded cheese...Used low fat Greek yogurt in place of sour cream and it was very tasty...My husband loved it! We will have the leftovers for breakfast with crispy bacon...I agree with the other reviewer: It does take a while to peel and cut up the squash...Make sure you have a good sharp knife and cut the squash into bite size pieces if you don't have a food processor... Read More
(5)
Rating: 5 stars
03/02/2019
This is a delicious recipe!! I know I'll be making this one often. My hubby loved it too, someone at his work smelled it while he was heating it up, so he had to share some! That guy loved it too! To make it a full meal, I added some browned Italian sausage just before putting it in the casserole dish. Read More
(4)
Rating: 3 stars
08/11/2014
definitely had a quiche texture was not expecting that. Added extra salt as well Read More
(2)