Sarah Harris published a 2400 word guide on 19 awesome tips and tricks to freeze vegetables. You can find the complete article with excellent grahics and charts at: https://electrosawhq.com/tips-and-tricks-to-freeze-vegetables/
As a preview, check out these tips:
#1 Freezing Fruits – There are a number of ways to freeze fruits, although it can be a little tricky. The following are two methods I’ve found to always work well. When freezing berries, place them all out on a plate or cookie sheet and freeze that way. Once they are completely frozen you can transfer them into a container or a freezer bag.
My apples and peaches and such always turn brown fast. I don’t really know why, but if you are going to freeze them for say a smoothie or recipe, then you can add ascorbic acid or vitamin C tablets to some water and dip them in that. Lay them out and let them dry before plopping in the freezer.
#2 About Blanching – One of the many questions that come up when people start to prepare to freeze food is: “Which vegetables do not need blanching before freezing?” “Which vegetables do?”. You may have asked yourself if you can freeze raw vegetables or if you have to blanch them before freezing. Well, everyone who’s been in or around a kitchen has heard of blanching at one time or another. Blanching is a way for veggies to keep their color and flavor.
The technique destroys all the bad organisms in the food and then packs it tightly together. What happens if you don’t blanch vegetables before freezing? Well, to be honest, you’ll be dissatisfied with the outcome, to say the least. Freezing vegetables without blanching can leave you with dark and sometimes black vegetables that aren’t edible. Remember to only blanch vegetables, though.
#3 Get Rid of That Air – Always get the air completely out of the container or bag that you are using. Air is what lets freezer burn sink in.
#4 Ice cube Trays – Ice is not the only thing that those little cubed trays are used for nowadays. These are perfect for stock, olive oil mixed with fresh herbs, flavored butter, coffee for iced coffee, roasted garlic, lemon juice, citrus zest, cookie dough, wine, caramelized onions and more. There are a number of ways you can spread your wings and use those little trays for more.