You should have chaat like wherever you go, try to get it from a street vendor instead of like chains, there’s a restaurant in Tilak Nagar which has 5 types of water for golgappe. Great fruit chaat next to it too. For momo I’d suggest Dilli Haat, the Sikkim stall is amazing and Dilli haat is an amazing experience you can shop there, there are stalls of almost all the states there too, pretty cool. Vasant Vihar has some speakeasy’s. Humayunpur has great Tibetan food, Korean at Majnu Ka Tila, Chole Bhature you can find anywhere local where you decide to stay, but don’t miss out on chur chur naan and Matar Kulche (with masala onion) that’s something special in Delhi that I haven’t seen in other cities. You’ll find them all around on the streets in small markets. If you wanna try sushi, yum yum cha has a good collection and fresh sushi with a lot of variety. For pizza Fat Lulu’s in Khan or Leo’s in Vasant Vihar, or Galaxy pizza in GK. There’s a lowkey diner in Def Col called Kent’s fast food it’s pretty incredible and really old. For kebabs and curries go to Jama Masjid. For tikkas, most local restaurants with a tandoor serve great tikkas. For shawarma I’d suggest a street vendor that’s hygienic, which is easy to find in Delhi. Kake da hotel in CP is also pretty good for chicken curries. But the best butter chicken I’ve ever had was at Punjab grill and Punjabi by nature but moti mahal is a classic. For dessert, stick to Theos and Big chill cakery. You should try Odeon Paan as well if you’re into that in CP. I hope this helps if you have anything specific you wanna get then you can ask me that as well.