One of the basic criteria for perfection in the prepping world is multipurpose utility. For foodstuff, the product also needs to keep well, be nutritious and be easy to acquire or stockpile.
Very few fresh items meet these criteria, but one most certainly does: the egg. Having a source of eggs for survival is just an example of good preparation if you can manage it. In addition to being extremely nutritious, eggs purportedly have more than 100 uses. We tend to think that’s a lowball estimate.