Delhi Darbar is an excellent Indian restaurant in Xi'an. I usually order palak paneer and malai kofta when trying a new Indian restaurant, because unlike curries, it's really hard to make these without fresh ingredients. (In China, you either need to make your own paneer or serve something with shelf-stable cheese in it.) The dishes were perhaps a bit bland and safe, but they unambiguously passed the quality test. We also had some veggie raita and garlic naan, both of which were highly delicious. We knew this place was legit when we asked for some pickles and they brought us a half-full jar of imported spicy Indian pickles.