The yield or quantity of frozen onions will depend on the number of onions you start with and the size of the onions you use. Additionally, how finely you slice or dice the onions will also affect the overall yield.

If you start with a specific number of onions and follow the steps to slice or dice them before freezing, the yield would be the equivalent amount of frozen onions. For example, if you start with four medium-sized onions and end up with two cups of sliced or diced frozen onions, that would be your yield.

Since the yield can vary based on individual preferences and needs, it's advisable to customize the process according to the quantity of onions you have and the portion sizes you find convenient for your future recipes.

The preparation time for freezing onions is relatively short, and it primarily depends on your chopping skills and the quantity of onions you're dealing with. On average, it might take around 15 to 30 minutes to peel, chop, and flash-freeze the onions. Flash freezing usually requires an additional hour. Keep in mind that this estimate can vary based on your familiarity with chopping vegetables and the specific tools you use. Once the initial prep is done, transferring the frozen onions to storage containers is a quick process. Overall, the total prep time is relatively minimal, making it a convenient way to preserve onions for future use.

Onions are a versatile vegetable that can be found in grocery stores year-round, making them a staple in many kitchens. However, the peak season for fresh, locally grown onions can vary depending on the type of onion and the region. Here's a general guide to when different types of onions are typically in season:
Spring Onions: These are usually in season during the spring and early summer months. They have a milder flavor than mature onions and are often used in salads and as a garnish.
Green Onions/Scallions: These are available year-round but are often at their peak during the spring and summer months. They are commonly used in salads, soups, and as a garnish.
Yellow Onions: These are the most common type of onion and are available year-round. They are typically harvested in late summer and fall, and you can find them in stores throughout the year.
Red Onions: Like yellow onions, red onions are available year-round, but their peak season is in late summer and fall.
Sweet Onions: Varieties like Vidalia, Walla Walla, and Maui onions are known for their sweetness. They are usually in season during the late spring and summer months.
It's important to note that these timelines can vary based on the specific variety of onions and the growing conditions in different regions. Additionally, thanks to modern storage and transportation methods, many types of onions are available in stores regardless of the season. When shopping for onions, choose ones that are firm, with dry and papery outer skins, to ensure freshness.

Yellow onions are generally considered the best variety for freezing. Their strong flavor and versatility make them a popular choice for a wide range of dishes, and they hold up well to the freezing process. Yellow onions are also known for having a good texture and consistency after freezing and thawing.

When freezing onions, it's essential to consider the intended use. Yellow onions work well for most cooking applications, including sautéing, caramelizing, and using in soups or stews. Their robust flavor tends to withstand the freezing process better than milder varieties.

While yellow onions are a preferred choice for freezing, you can also freeze other varieties like red onions or sweet onions. However, keep in mind that freezing can alter the texture of onions, so they may become softer upon thawing. Regardless of the variety, it's crucial to properly prep and store the onions for the best results when freezing.