Hmm...I think the "food police" would say 4 days, but I've kept this for as long as 5--it hasn't lasted beyond that.
I make a quick omelet with a Philly cheese"steak" theme, but I guess it's more like a frittata. Here's how I do it:
- Heat up your broiler
- Whisk together the required amount of eggs with a splash of water, salt & pepper (I usually use 3).
- Melt a tablespoon or so of butter in a non-stick but oven-safe skillet over medium-low heat (I use a very well-seasoned cast iron or I have used a regular non-stick and covered the handle with heavy-duty foil)
- Once the butter is melted, pour in the whisked eggs (make sure they're well mixed and a bit frothy)
- Instead of just letting the omelet cook without agitation, actually stir it slightly until it's still very runny, but looked like halfway cooked scrambled eggs. Let it cook for a few seconds without stirring to slightly set the bottom of the omelet/frittata
- Then add the warmed the beef mixture. I don't measure, I just put some on after heating it in the microwave
- Add a slice or 2 of cheese--it's usually swiss or cheddar for me
- Then I put this into the broiler, usually for just 1 minute! Even though I usually like a nice golden crust on my frittatas, for this I like the cheese to be just nice & gooey.
I then shake the pan and slide/fold it onto a plate and it comes out as nice as any omelet I've had at a restaurant. For me, this makes a nice, moist, fluffy treat that fills me up for hours. YUMMMMMMMM