You can vary this in endless ways and with all kinds of vegetables. I love to use whole grain pita bread or a slice of sour dough whole wheat bread and you can even use rye bread. Just remember to toast the bread until it is crispy and serve the dish straight away.
Important to know in regards of the poaching: You need to use fresh eggs. The more young an egg is the more thick and elastic the white will be, meaning that it will be better at keeping together an forming a whole beautiful egg once in the water.