Hong Kong Büfé is a small decor-deprived eatery within Budapest's Chinatown (Monori Center). For the longest time, the place was best known for its Chinese breakfast foods like cong you bing, congee, and youtiao, but they've shifted to lunch and dinner-only service.
The highlights of the pan-Chinese menu are the slightly spicy and amazingly reviving Chongqing noodle soup (chong qing xiao mian), the stir-fried rice cakes with chicken (chao nian gao), and the twice-cooked pork belly (hui guo rou). They each cost less than €5. The pork buns stacked behind the glass are ideal for snacking; as are the cooked chicken feet, if you're feeling adventurous.
One final note: Don't let Hong Kong Büfé's unpretentious, bare interior intimidate you. Similar to HeHe and Shandong, this place is immensely popular among local Chinese people, which is the only stamp of approval a Chinese restaurant really needs.