Wash beans and boil them with little salt (if you are using dry beans then soak them overnight)until soft.
Peel tomato and grind it with boiled beans to a semi smooth paste (it should be thick).
Heat oil in a pan ,add 1 tbsp of onion,saute till pink,add green chilly paste,bean paste,dhania jeera powder and corriander leaves,mix well and cook for 2 mins.(check salt)
Take one roti,place 2 tbsps of paste, spread it lenghtwise, sprinkle chopped onions, chopped chillies (you can omit chillies for kids) and 1 tbsp cheese.(you can add more cheese if you want to)
Place roti under a hot grill or microwave for the cheese to melt.
Remove from the grill and roll it tightly, finish rest of rotis same way.