Theoretically, in a ozone-less environment and providing they don't sublime first

Hum... Nope.

Eggs are not homogeneous substances or mixtures for what the word "melt" even makes sense. But also, most of an egg's mass is composed of substances that suffer chemical transformations in much lower temperatures than other parts can melt (at any pressure).

Even if there is no oxygen on your environment, an egg will decompose itself before all of it is molten.

Interesting. I assumed that if rocks can melt, so would any substance given enough heat. Granted, not without chemical interactions (I assumed burning wouldn't count), but with protein they would at least unfold (denaturate).

This paper seems to at least hint at the possibility:

https://pubmed.ncbi.nlm.nih.gov/21095941/

If you freeze them first, sure

Didn't you hear the OP? It's 100% possible.

Even diamonds can melt. Coincidentally they melt at the same temperature.

Carbon will never melt at atmospheric pressure, you need more than 100 atmospheres of pressure to melt carbon. Otherwise it just sublimates straight to gas.

What gas does it sublimate into?

Gaseous carbon.

Chocolate eggs sure can.

Maybe google it? Oh…wait