eggs are a quick and easy way to add protein to make sure it is a complete meal although in this meal, I dont think extra protein is needed. However, since it is a traditional breakfast it was probably created when people did mostly agrarian work so they needed hearty and filling breakfast for hard manual labor. This is why I think many breakfast in South America and the Caribbean are so high in protein. This is where people are cutting down sugar cane and doing other hard physical labor and most likely eating once twice a day!