Looks like a pastie to me when i think of brunch in Bangkok i think of banquets.
The Sunday Brunch at The Square at Novotel Ploenchit can be had for half price with the link i'll put below below, Thats with free beer and wine too and 3 hours to drink your money back. Big seafood selection if you like that. The honey ham is the nuts there.kids play area in there also.
Sunday Brunch Promotion | Novotel Bangkok Ploenchit Sukhumvit