Sauté the mushroom and tomato with a pinch of salt and pepper.
Thread half of the hard-boiled egg onto a skewer, followed by lettuce, mushrooms, and tomatoes.
Place the other half of the burger on the end of the thread.
Notes
"Egg yolk and mushrooms contain high vitamin D which aids healthy bone development and growth for toddlers."- Café Columbia, Columbia Asia Hospital – Petaling Jaya Dietitian, Yap Zi Qian.