Take oil add whole garam masala and one chopped onion. Sauté for some time

Add ginger garlic paste to it and stir.

Add turmericpowder, coriander powder and red chilli powder to it.

Add 1 tomato,1potato, peas and prawns to it.

Cover the vessel and let it cook for 5-10min on low flame.

Then add rice and water and salt to it. And cook till it's done.
You can add lemon juice to it by squeezing 1/2 a lemon.