Goto Siam Square (Soi 5, just outside Siam Paragon the streets behind the main Sukhumvit road).

Name of restaurant is Som Tam Nua (papaya sald n fried chicken...yummy!) or can try Ban Khun Mae (not as good as Som Tam Nua)

I also recommend Sirocco Sky Bar @ Lebua Hotel (Silom road)

ok..i would recommend the Sirocco too