I haven't tried, but I have opened my bag of ova easy eggs. I use it as a mix-in with baked goods. I keep the bag clipped shut in a Ziploc bag in my freezer. I haven't noticed a degradation in the product over the past year (maybe two...).

I will say, I think the advantage to cooking them in a pan is you can get the moisture content to your liking. You run a risk of ending up with egg soup using this method. I notice the blog post added in dried veggies. I wonder what role that played in getting the moisture content right.