Hariyali obviously it's the spinach pure that's the key ingredient here It's the spinach pure that gives the colour and flavour to other ingredients like soya chunks, tofu etc. In this recipe. A rather long list of ingredients goes into this recipe, but it's completely worth the effort The mushroom tastes very good in the gravy; however, you can replace it with any other vegetable of your choice too perhaps cauliflower or potatoes. Do not overcook this gravy as the bright green colour will be lost and with it, the visual appeal as well