Roti Pao with Kaya & Butter

yummy..."rotibao"...i still remember...when i was little about age 4...each time the "rotiman" come...i will ask my grandmother to buy1for me...and i will just request for "just kaya" the mix of butter just after i grow up...if u go penang...and meet some "bread seller' in tricycle or motorbike...just order this "bun"...what favour u like just mention, the roti seller will do it for u...u sure will love it, although the ingredients is a bit "cheap" taste, but is "lighter" than those "expensive bun" that used those "tick-tick "kaya" and not like this roti-pao kaya...is light and u still can feel "the taste of the water"u wont feel too sweetlike some of the "expensive kaya"...i dono what "kaya" call in english...it is a mixture of egg, sugar and coconut milk...