I keep a bag of zapped up cauliflower in the freezer for such occasions - takes 4 mins in the microwave, and is cheaper than takeaway rice. Mind you. we tend to eat at home, so that makes things easier than eating remote..... Patna or basmatti rice is said to be better glycemically than american or quickcook rice that chinese takeaways use.
We had a takeaway curry from a local indian, and my bgl rose 1,6 mmol/l at the 2hrPP, but fell back to 5.3 mmol/l at the 4hrPP. This was with patna rice, mango chutney and a couple of poppadoms as well. I think the curry sauce plays a part too, so going hot and spicy tends to be lower carb than mild or medium, since these milder curries tend to have added sugars or fruit. Onion bhajis are often a minefield too especially the frozen ones at Asda in my experience. Dahls are often high carb due to the lentils.