Beat egg with salt, pepper and milk. Set aside.
Heat oil and butter in a skillet. Add onions, potatoes and season with salt and pepper.
Cook till potatoes get crispy.
Add seasoning and mix well.
Add in bread pieces and cook till bread get crispy.
Pour in egg around the bread.
Now top with cheese.
Cover with lid and cook for 5 mins on low heat.
Remove it and cut into wedges. Serve.