Ideally, my meal would consist of Hunan levels of spice and a side order of Lanzhou lamian. In which case, a bonus would go to getting an unsweetened bowl of Xinjiang yoghurt.
As for snacks, that's a toughie. Outside of any street food offering, Glico's China division makes good sesame crackers, and then there's the "controversial"
Uyghur nut cake.
Then, the late-night bbq vendors appear and tempt me with mantou, eggplant, leeks, corn, and impressive amounts of garlic. Those folks are constantly missed.