Delightful, unusual flavor! A nice departure from casserole recipes that call for cream soups or cheese. Pretty enough for a dinner party. May use other vegetables as well.



Original recipe yields 8 servings
The ingredient list now reflects the servings specified


  • Preheat the oven to 375 degrees F (190 degrees C). Lightly grease a 9x13-inch baking dish.

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  • Place carrots into a pot and cover with salted water; bring to a boil. Reduce heat to medium-low and simmer until just tender, about 15 minutes. Strain carrots out of the water with a slotted spoon. Add zucchini slices to the pot and simmer until tender, 2 to 3 minutes. Drain, reserving about 1/4 cup cooking liquid.

  • Stir reserved cooking liquid into mayonnaise, onion, horseradish, salt, and black pepper in a large bowl. Mix cooked vegetables into mayonnaise mixture until well blended; pour mixture into prepare baking dish.

  • Mix bread crumbs and melted butter in a small bowl; sprinkle over vegetables.

  • Bake in preheated oven until bread crumbs are lightly browned, about 15 minutes.

Nutrition Facts

214.9 calories; 2.71 g protein; 13.85 g carbohydrates; 17.36 g fat; 20.55 mg cholesterol; 444.36 mg sodium. Full Nutrition

Reviews (19)

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Most helpful positive review

Made it last night and we both loved it. I used graded carrots and cooked the 2 vegetables together since I was in a hurry.

Most helpful critical review

I honestly can't decide whether I liked this or not. I wanted something different for Christmas this year and this recipe seemed to fit the bill. My sister enjoyed it but the rest of us just couldn't decide if we liked it or hated it. It was definitely interesting and different and I'm glad we at least tried it but not sure if I'd make it again.
23 Ratings
  • 5 Rating Star 12
  • 4 Rating Star 10
  • 3 Rating Star 1
Nice way to eat veggies w/o cheese. I used fat free mayo panko crumbs and left off butter.. sprayed with Pam to get crunchy..
As a basic recipe it is a good foundation. I cooked the carrots and squash in low-sodium chicken broth (adding 1/2 chopped onion with the zucchini to cook). Increased the horseradish to 1 tsp and added 1/4 tsp garlic powder and 1/4 tsp onion powder for flavor. Made fresh breadcrumbs and added 1 tbsp. Italian blended seasoning to them (again to heighted the flavor profile). Skipped the grated onion but added 1/3 c fresh grated parmesan cheese to the topping. You could easily add chopped chicken browned ground beef of turkey to make it a one dish meal - or keep it as a stellar side dish!
I was a bit disappointed in the lack of flavor. Seemed like the prep time wasn't worth the end result. It wasn't bad but needs something else to add to the flavor. Not something I would make again but it was a decent side for lunch and used up the veggies I needed to get rid of out of the fridge.
Made it last night and we both loved it. I used graded carrots and cooked the 2 vegetables together since I was in a hurry.
I needed a dairy free casserole and this fit the bill. I cooked the carrots with a little water in the microwave until nearly done then added the squash (little more water) and all the seasonings and finished them with the addition of a bit more herbs since one reviewer indicated that it needed something. I then stirred in the mayo and proceeded as directed. My family loved it but I thought the mayo flavor was a bit overpowering....would like something more savory. I'll make again and play with the flavors. Thanks for a great starter recipe!
Easy recipe that can include other vegetables. I added a tomato and okra to mine. Overall a very good flavor without all the cheese that so many other recipes include.
This was a very nice way to mix some veggies up so that their tasteful. Everyone enjoyed them. I used a carrot zucchini and squash mixture. I was asked for the recipe which is always a good sign. I will be making it again!
This is good and easy. I did not pre-cook the zucchini. I microwaved the carrots with 2 slices of onion then chopped the onion. Added more horseradish as I love how it mellows when baked. Will definitely make again.
This was fantastic. Hands down fabulous. Very easy to make and I had all the ingredients in my kitchen. I have a feeling I'll be making this for many years to come.