Eating salad in India is high-risk.

As a rule in India, I was told to avoid any food that isn't freshly cooked and served hot, whether from street vendors or restaurants, and that restaurants were risky beyond hotel restaurants that catered substantially to foreigners from beyond Asia. And that rule mostly served me well. That meant most ice cream was to be off limits, most salad and fruit off limits unless prepared in a way that involved peeling and/or using boiled and filtered water to clean and prepare the veggies/fruits. It didn't mean all street vendor food was off limits, just all non-hot food and most hot food except of certain sorts or from certain street vendors with a long history of serving foreigners too without issue. And most dairy was off-limits beyond the cocoons (with the exception of some yogurt). The main focus was to avoid anything that used regular tap water without the water having gone through a long boil and filter process before use, and so drinks beyond the homes were meant to be sealed carbonated beverages or bottled water bought from reputable sellers. Salad and ice cream were a general "no no". And being careful with keeping your mouth shut in the shower/bath and using only reputably-supplied bottled water for brushing teeth can definitely help in India.

I used to eat some street food in India, but I sort of knew that freshly roasted corn cobs from some valley streets vendors and freshly grilled cut meat cubes on skewers at some places in Delhi and elsewhere in northern India was doing fine by me. The "winter vomit"-producing day care viruses in the Nordics seem to not hit (or not hit as hard) some kids who have had lots of exposure to India as it hits kids who haven't. Not sure if the difference is due to fortitude arising from prior exposure to pathogens or if it's due to having more exposure to having stricter rules about hand washing, bathroom use and what to eat and not eat. It could also be due to the "gross candy" buying and consumption habits that seem rather prevalent as part of the popular cultural in at least parts of the Nordic countries.

When I've had severe food poisoning from plane food -- rare as it has been for me -- it's never been from food served to me on flights departing India nor even from flights within India. It's been from plane food catered for US airlines flying from Europe or the US or food catered for European airlines flying within Europe or from Europe to the Americas. To my amusement, I've never had food poisoning from food that was served to me on domestic flights operated by Indian carriers with code-share operations with US or European carriers. The worst bout of food poisoning I've experienced has been when flying UA from BRU.