Dal roti is a staple food in North India.  It is a wholesome food, and usually people eat it for  dinner or lunch. Dhabas are roadside restaurants and dal roti is the most famous and popular dish there. Dhabas serve dals with tandoori roti (flatbread made with whole wheat and traditionally cooked in tandoor (cylindrical clay oven) hence the name tandoori).  It’s almost always served with some ghee or butter on top. 

Dal roti is fairly easy to make and I tried making tandoori rotis at home (using a toaster instead of the usual tandoor) and it came out pretty well. All the ingredients are typically available at home.