This is what you need! Flowers, leafs, string, eggs and onion shell. The bigger onion shells the better. Just go to the supermarket and dig around in the onion box. You'll find quite a lot!
Moist the egg and the flowers/plants with water, that will make it easier for them to stick to the egg. Don't put flowers over the eggs stamp, that will make it stick out..and you want to hide that ugly stamp. I recently discovered that putting a little feather makes a beautiful print!
Moist the onion shells and wrap it carefully around the egg. Don't move around the flowers. Red onion shell colors much much more than yellow. But it can color too much. It's beautiful when you put little pieces of red onion shell around the egg though.
Wrap the string tight around the egg. String that's wrapped around sloppy will fall of when it's cooking. Also, use a lot of string. The tighter you spinn the flowers and onion to the egg, the better prints you'll get.
Put all the eggs together with the onion shell leftovers into a pot. Cook it for about 15 minutes. These eggs are supposed to be eaten and not hung on branches!
Rinse the cooked eggs in cold water and wrap the string and onion shell carefully of.
Rub the eggs in bacon or some other grease to make them shine even when they're dry. You don't have to do this but it gives them a extra nice appearance!
Go outside and find some nice moss, the eggs will look beautiful resting on it :) Good luck! I hope you try this during eater. If you're not an onion fan you can always give it a try with silk otherwise! Here's a tutorial on how to do it with silk ties.