I wanted to make some creamy vegan sushi with avocados, sweet potatoes, and Mayo. I was afraid the avocados would turn brown too fast, so I turned to the Internet and found this solution https://www.thespruceeats.com/stop-an-avocado-going-brown-435127

Blanching! Well, I have blanched tomatoes before, but never anything else. So , I thought I’d give it a try. Turns out that is totally the solution! I experimented to see how long the sushi could be left out considering that would probably be set it on the table to serve people eat it and it was over 45 minutes and I didn’t brown. You must have avocados that are pure green inside, so make sure they are fresh. My go-to avocados are Aldi’s Organic Avocados.