One of my favourite dishes and it does take a little bit of patience for the potato and cauliflower to steam in its own moisture.
Ensure your potato is cooked to a size that it will cook the same time as the cauliflower or the cauliflower may become overcooked and disintegrate.
The recipe I followed: https://www.youtube.com/watch?v=KJCTj-RTJ28
My list of ingredients as I tend to buy a large cauliflower and add more potatoes so I had to increase the spices:
Ingredients
4 TBSP of oil
2 tsp cumin seeds
350g Potatoes and 1 Med Cauliflower
Heat the oil, fry the cumin seeds until they are fragrant. Add the potato and cauliflower and steam fry covered with a lid until the vegetables are soft.
The Tarka
2 small onions sliced
1 TBSP ginger and 4 fat garlic cloves crushed
1 TBSP of tom puree and some water
3 tsp coriander powder
1 tsp tumeric
1 tsp of chilli powder
1 tsp salt
1 tsp sugar
2 tsp garam masala