For the stew or rojo la biryani as we call it ;

Mix your food color with a small amount of water to make it easier to work with.

Heat oil and deep fry onions until golden color (don't overcook it makes the stew bitter)

In a bowl put the diced potatoes and add in food color and toss so that the color distributes evenly.

In the same oil fry the potatoes for about 2 to 3 minutes or until crispy.

In a pot put some oil, add in ginger, garlic and pilau mix and let it cook. Add in beef and stir.

Add in royco and let it cook a little.
Put in tomatoes, green pepper, tomato paste, sour milk, lemon juice, salt and stir.

Throw in the fried potatoes and deep fried onions and let it cook till ready as per your desire.

For the rice ;

In a pot add in water, oil, salt and rice.

When water is almost drying up pour in the food color all round and let it cook till water dries up.

Serve your biryani and enjoy!