This menu combination of potato biryani, cold lassi, and custard is really nice on a low budget. Biryani is at the top of everyone's list of favorites, and using potatoes instead of meat can reduce the cost a lot while maintaining the taste. The fact that the curd is whipped while making the gravy of potato biryani is very useful in preventing the curd from breaking. Moreover, the process of boiling the rice 80% and then simmering it makes the biryani quite neat and juicy. Choosing sweet lasagna for digestion after a heavy meal is a very wise thing to do. And by adding milk cream to the plain custard and serving it, the plain dessert also looks quite attractive. It is really commendable to prepare such a satisfying meal for just 600 taka with the ingredients you have at home and a few things you buy from the market. From the response of your friend, it is understood that the event was quite successful. Best wishes to you in this contest. 😊