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Last Updated on September 21 , 2023

Do you have excess onion that you ’d care to preserve ? Then this is the recipe for you ! In add-on to make sweet , delicioushomemade onion powder , freezing roast onion is one of our favorite slipway to uphold them ! When done right , it is passing comfortable to take out out just a few roasted onions rings from the freezer as you need them for future meals . Plus , now they ’re instill with that scrumptious roasted , caramelized onion plant flavor . Even in their frozen state , the scent whole remind me of electrocute onion closed chain ! Yum !

browned roasted onions on a tray, about to go into the freezer

In this example , we are using scented homegrown Walla Walla Allium cepa from the garden . However , you may use any type of onion for this mental process ! It is most ideal for processing and storage if the onions are of decent size , able to give you squeamish stocky rings .

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SUPPLIES NEEDED

INSTRUCTIONS

Step 1: Prepare the Onions

While you are preparing the onion plant , preheat your oven to400 ° fluorine .

As needed , wash your onions , cut away any root and tough bottoms , and peel aside the outer papery layer .   Next , cut the onion into approximately1/4 to 1/2 - column inch duncish rounds . We like to do this across their equator , which helps them stay intact as slices of ring . Sorry , eyeball !

Spread the Allium cepa rings out in a single layer on a baking genus Pan lined with parchment composition . Yes , you really will apprise the economic consumption of parchment paper here ! I promise . You ’ll see why in Step 3 and 4 .

Seven large Walla Walla sweet onions are laid out on table in a single file line from top to bottom. They still have their roots attached and about a foot of their greens are still attached as well. All the onion bulbs are pointing to the left. The onions bulbs range in size from very large to medium

Next , drizzle a modest amount ofolive oilover the onion , and sprinkle onsalt and pepperto your liking .

As you could see , we made a double - batch !

Step 2: Roast the Onions

laugh at the onion in the oven on400 ° F for approximately 30 arcminute , until they commence to soften and become brown on the edge or top . If you are roasting multiple cooking pan of onion plant , go around the pans halfway through . Now sit back and enjoy that delicious smell – as it transforms from raw , pungent onion plant to sweet roasted onion goodness !

Step 3: Freeze Before Packaging

Here is thekey trickfor this whole mental process – and maybe something raw for you ! Instead of throwing all the roast Allium cepa slices into a package together now , we want to freeze them on their own first ! When easy , warm foods are lumped together and frozen , they will do just that – chunk together and freeze .

The mystery to prevent glacial foods from adhere together is to suspend them individually first . This deception apply to any sort of nutrient you are attempting to block , not just onions ! Using this method , it is easy to take only a small share out of the deep freezer to employ later .

After slay them from the baking sheets from the oven , allow for them to cool down at room temperature . Then , send the entire baking sheet(s ) into the freezer – with the roasted onion plant slice still separated and not touching . permit the Allium cepa to freeze for at least a few hour this way . We broadly get out them to freeze down overnight , and then package them the next day .

A two way image collage, the first image shows a hand holding a very large onion that has been cleaned of its peel, roots, greens, and dirt. It is ready to be processed for roasting. Underneath the hand and onion is a cutting board with the rest of the onions ready to be roasted. The second image shows a hand holding a slice of onion after it has been processed, it looks to be about 1/4 to 1/2 inch in thickness. Underneath the featured onion slice is a baking sheet lined with the rest of the onion slices, almost ready to be roasted.

Step 4: Package Roasted Onions to Freeze

Now that the chunks of roasted onions have frozen on their own , you could combine them into their foresightful - full term publicity to stop dead . And without stick to together!Do not allow them to defrost during the packaging physical process , so get all of your supplies quick before get out the onions   out the deep-freeze .

undress them up , and get them pack ! Here is where that parchment paper really help . Without it , the flash-frozen Allium cepa stick to the genus Pan like demented , and make this passage much more mussy and difficult to do rapidly . We learned that the hard way !

For the best results , pack the roasted onions into anair - compressed containerto freeze . We care to usethese BPA - complimentary , made - in - USA reusable plastic deep-freeze containers . They come in a assortment of sizes , which we practice for everything from roasted Allium cepa to soups and lentils . You could also pick out to vacuum varnish them . As a charge card - free alternative , you could heap the roast onions ring in wide mouth pint or quart - size of it mason jars ( which are deep-freeze safe ) – if your halo will match , that is ! Most of ours were too gravid .

Three sheets of sliced onions have been prepared and put on baking sheets. They have been drizzled with olive oil and sprinkled with salt and pepper. They are now ready to be roasted.

Step 5: Enjoy!

Now , whenever you are out of invigorated onions , pull in out a duo preserved chunks from the deep-freeze ! When hive away right , roasted onion willmaintain their quality in the freezer for 8 to 10 months – though they will be technically “ safe ” far longer ! We love to chop these up to contribute to sautéed veggies , soup , curry lentil , or even add to the dough ofhomemade sourdough bread .   Any formula or meal that you ’d desire onions with !

Be sure to also check out our easygoing instructions to preserve onions bymaking your own onion plant powder . I do n’t mean to make the roast onion rings feel bad … but that stuff ca n’t be dead !

I hope you enjoyed this article . Please feel free to ask motion , leave feedback , and spread the love life by sharing this article . Pin itbelow !

A baking sheet of roasted onions sits atop a freezer drawer pull out. The rounds of roasted onions are not touching each other and are ready to be frozen. There are frozen jars of miscellaneous items poking out from beneath the tray.

Oven Roasted Onions Recipe (Freezer-Friendly)

Equipment

Ingredients

Instructions

A three way image collage, the first image shows a hand holding a roasted frozen round of onion, is is brown on the edges and the face of the onion is slightly wavy from being roasted. There are specks or black pepper throughout. Underneath the hand lies two plastic containers with the frozen roasted onions packed inside them. The second image shows one of the plastic storage containers standing upright without a lid, the image is taken from a birds eye view so a roasted onion round is facing out. A second storage container is lying next to the first, revealing all of the onions rounds that can be stored within. The third image shows a hand holding a frozen roasted onion round at an angle, revealing the thickness of the slice. There are the two plastic storage quarts below aligned in the same manner as previously described.

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