Apple gourd

Tinda

Measured by g; no spoon or count conversion needed.

Instead of Apple gourd

Courgette
Use the same weight; it is softer and wetter, so salt and drain 10 minutes and cook 5 minutes less.
Bottle gourd
Use the same weight; peel and cube. Similar mild taste but releases water, so simmer uncovered.
Chayote
Use the same weight; peel, cube and parboil 5 minutes. Firmer and stays crisp.