Photo: Jennifer Causey; Styling: Ginny Branch
Hands-on Time
21 Mins
Total Time
45 Mins
Serves 6 (serving size: about 1 cup)

You can serve this side dish hot, but it's also great at room temperature.

How to Make It

Step 1

Heat a large skillet over medium heat. Add 1 tablespoon oil to pan; swirl to coat. Add onion; cook 6 minutes, stirring occasionally. Stir in tomato paste; cook 2 minutes. Stir in rind, thyme, 1/8 teaspoon salt, and pepper; cook 2 minutes, stirring occasionally.

Step 2

Preheat broiler to high.

Step 3

Arrange zucchini on a jelly-roll pan. Drizzle with remaining 1 tablespoon oil; toss. Broil 7 minutes or until lightly charred. Sprinkle with remaining 1/4 teaspoon salt.

Step 4

Preheat oven to 375°.

Step 5

Spread onion mixture in a 2-quart gratin dish. Arrange zucchini mixture over onion mixture. Sprinkle with cheese. Cover and bake at 375° for 25 minutes. Remove from oven.

Step 6

Preheat broiler to high.

Step 7

Uncover zucchini mixture; broil 1 1/2 minutes or until lightly browned.

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Ratings & Reviews

Great side dish

July 02, 2015
Even DH who normally complains when I cook zucchini said it was yummy.  Definitely a keeper here.


April 28, 2015
Made this exactly as written and turned out wonderful. The Onions had the best flavor. Very easy dish to prepare ahead also.

mp2908's Review

October 09, 2014
I'm tired of grilled zucchini and this was a great recipe for a change.

karinemarc74's Review

October 03, 2014
instead of tomato sauce used a can of tomatoes which delivered more flavour. added some garlic too.

saemerson's Review

September 02, 2014
Love this recipe. Added 2 sliced tomatoes sliced when broiled the zucchini. And a layer of extra parmesan cheese. The onion base seems dry but the liquid from the veggies loosens the tomato bases to a lovely sauce. Really great

acregan's Review

August 09, 2014
Dee-licious! Next time I'm going to double the onion mixture, layering it on top before adding the cheese. I know the calorie count will increase, but I don't care!!!!!

3Boys4Me77's Review

June 16, 2014
This was excellent! It went together quickly and easily and was extremely tasty. I used the leftovers for filling in a quesadilla for lunch the next day. Yummy! I'll definitely hold on to this one for when my garden is exploding with zucchini in a few weeks.

blanca201's Review

May 23, 2014

Whygal's Review

May 23, 2014
Loved this side dish. I am always looking for new ways with zucchini and this was perfect. The only change I made was to grill the zucchini--everything else I did as written.

cb1986's Review

May 21, 2014