Male 5'7 54 kg. need to gain weight. routine med student. uni from 8-3. sleep till 6. studies 7 30-9 30 sleep at 1. advice on how to gain weigt asap?

Increase sleep & cal: It sounds like you are not giving your body enough sleep, and weight will come up with more food intake. If you feel full with even small portions, then eating 6 smaller meals a day on a schedule may help. Although fruits and veggies are very healthy , they are low in calories. Calorie dense foods are nuts and oils such as salad dressing or olive oil on pasta, etc