cook cauliflower separately for 1 minute in microwave. cook cauliflower, potato, beans in water and when almost half done add salt and turmeric and keep aside.
In a wok or kadai, pour oil,add gingergarlic and green chilli paste then add onions
pour the vegetable mix and cauliflower, green and red capsicum and pineapple into this masala and add 1/2 water and salt and cook for another 2 minutes