what should i look for as meat replacement, lentils?
Any mixed vegetable. Particularly good in curries are cauliflower, potato, saag (spinach) or eggplant (brinjal) or a combination of any of those.
Okra is also pretty good but isn’t to everybody’s taste.
Pulse proteins to be found in peas, beans, chickpeas
Paneer (a firm type of cottage cheese) is also a favourite staple of the vegetarian curry. Just got back from Northern India, and paneer features quite widely. It’s easy enough to make at home too, and I’ll often do a batch if I’m cooking curry for a dinner party. It also features in some Indian puddings.