Thank you for choosing HCM.
First of all you cant add 10 kilos in a month and even if you can it wouldnt be healthy.
Gaining weight is much more easy than losing it.
you can try the following:
1.Eat 4-5 small meals a day ( to boost metabolism
2.Consume a high protein diet(around 100gms/day) ( chicken,eggs fish etc)
4.Take a protein powder(whey)
5.Add a multi-vitamin to your diet
6.Eat plenty of fruits
And lastly have a bit of patience you should see some nice gains ( 5-8 kg) in around 2 months or so .
Thank you and take care