Where in Nepal are you Shyam-ji ? kathmandu valley- Pokhara ma ho bhaney there are a lot of options I think haina ra ? What kind of field are you looking for(ali ali research ta gardai hunuhuncha hola ni haina?) 
as said above by Hover_over opening up a bar or restaurant is one,
aajkaal tourism is also picking up re why not invest on that ? 
if you are interested how about starting a farm ? like dairy farm or animal farm or vegetable farm 
if you are in terai how about fish farming ? Nepal ko 60% fish India bata import huncha re .
How about opening up an adventure sports agency (I dont know if 10 lacs will be enough for that though)
or if you are not interested in laborful jobs like farming How about euta pasal kholney basney....

Huna ta dherai thaha chaena but just suggestion matra gareko la ..... Janney bhayo nabhannu hola...