In a bowl, add arrowroot flour and water. Mix well till there are no lumps. Keep it aside.

Now in a pan, add sugar, water and lemon juice. Cook till sugar syrup becomes slightly sticky and reaches 1 string consistency. Keep it aside.

In a pan, add 1 tsp ghee, chopped cashews and pistachio. Sauté for a minute. Takeout into the plate and keep it aside.In a pan, add arrowroot and water mixture. Stir continuously on medium flame till it becomes slightly thickened.

Then add sugar syrup gradually and mix well.Now, start adding ghee, 1 tbsp at a time and keep stirring all the time.Cook halwa for 15-20 minutes on low flame till ghee starts releasing from its sides.Then add orange food colour and mix well.
Add chopped nuts and cardamom powder.

The halwa will become thicker, stir and mix again and cook for 1 to 2 minutes stirring often, till the mixture gathers in one mass. By this time the mixture must have already left the sides of the kadai or pan. You will also see ghee releasing from the sides.

Now switch off the flame and transfer halwa mixture to a greased pan.then level with a spatula. level neatly.then add almonds and pistachios slits on top for garnish. Press the nuts with spatula so that they stick to it.

Allow to cool at room temperature.
Once cooled,then cut it in squares. It can be stored in an air tight box and then refrigerated.