They know in ways we can only try to emulate what their bodies need to grow and be strong. May be he'll think it's eggs and get another source of protein. I'd just give him what he wants-pasta, eggs, whatever. Try leftovers if he liked the meal the night before. The cholesterol in the eggs is good too.
Cholesterol is great for a growing brain.
I wish I could get my 18 mo. He hates them. My dd went through an all egg period and now she eats them only a few times a week. I agree with everyone that kids know what their bodies need. As long as you don't mind a bit of a mess, let them feed themself.