Cook the rice with the 2 cups of water and salt till just cooked and make sure the rice grains dont stick to each other, drain the water and keep it aside.
Boil or steam the diced potatoes, peas and carrots together with salt till just cooked, drain and keep aside.
Heat the butter in a pan,add the cumin seeds to it.
Add the chopped onions when the cumin starts spluttering and fry till transparent.
Add the ginger garlic paste and fry for a one or two minutes.
Add the chopped tomatoes and cook till the oil seperates and the masala becomes mushy.
Now add the turmeric powder, chilli paste or powder,pav bhaji masala and salt.Cook till the flavours incorporate.
Add the capsicum and the boiled potatoes, carrots and peas with 1/2 a cup of water and cook for 5-6 minutes in low flame.
Finally add the cooked rice to the pan and mix well but gently making sure the rice grains do not break.
Adjust the salt if needed,sprinkle the lemon juice and coriander.Give a final stir and switch off the flame.